Hillary Clinton and Donald Trump are preparing for their highly anticipated Monday night debate showdown in ways that appear to be as different as their candidacies. One looks to be hunkering down with homework, research and rehearsals, while the other seems to be taking an on-the-fly casual approach to what could be the most important 90 minutes of the presidential election.
The first presidential debate could easily become one of the most watched events ever, and it will be nearly impossible to avoid seeing at least some parts of it on a television screen, cell phone, tablet or laptop or social media.
Here's what we know about how they are preparing:
Between her 2000 Senate run and two presidential bids, Clinton has appeared on the debate stage nearly 40 times. Still, she has never prepared for an opponent quite as unpredictable as Trump.
In an email to supporters this week, Clinton touted her debate experience but acknowledged Monday's matchup is "the most important" yet.
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(Original Caption) San Francisco: Jimmy Carter (L) takes notes as Pres. Ford makes a point during the second of the presidential debates at the Palace of Fine Arts here.
Vice President Richard Nixon dabs at his chin and lip in Los Angeles on Oct. 13, 1960, during his televised debate with Sen. John F. Kennedy. Nixon was in a studio in Los Angeles, while Kennedy was in a studio in New York. This was the third in a series of debates between the two presidential candidates. (AP Photo)
Rick Perry stumbles when trying to name the three Federal Departments he would eliminate as president during the CNBC Michigan GOP Presidential Debate in Rochester, Michigan. (Photo by Ralf-Finn Hestoft/Corbis via Getty Images)
ST. LOUIS - OCTOBER 02: Democratic vice presidential candidate U.S. Senator Joe Biden (D-DE) and Republican vice presidential candidate Alaska Gov. Sarah Palin (L) greet each other at the start of the vice presidential debate at the Field House of Washington University's Athletic Complex on October 2, 2008 in St. Louis, Missouri. The highly anticipated showdown between the two vice-presidential candidates will be their only debate before the election. (Photo by Don Emmert-Pool/Getty Images)
CLEVELAND, United States: US Vice-President Dick Cheney points during his face off with Democratic vice-presidential candidate John Edwards at Case Western Reserve University 05 October, 2004 in Cleveland, Ohio. The vice-presidential debate is focusing on foreign and domestic policies. AFP PHOTO/Steve JAFFE (Photo credit should read STEVE JAFFE/AFP/Getty Images)
YEAR-2008 US Republican presidential candidate John McCain (R) and Democrat Barack Obama leave the table after the final presidential debate at Hofstra University in Hempstead, New York, on October 15, 2008. AFP PHOTO/Emmanuel Dunand (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
New York Senator and Democratic presidential candidate Hillary Clinton (L) stands on stage with rival Illinois Senator Barack Obama (C) and Republican presidential contender Arizona Senator John McCain (R) at the end of the ABC/Facebook New Hampshire debates in Manchester, 05 January 2008. AFP PHOTO/Emmanuel DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
(Original Caption) Omaha, Nebraska: Following their vice presidential debate, Senators Lloyd Bentsen (L) of Texas and Dan Quayle (R) of Indiana reach out to shake hands, October 5th.
NASHVILLE, TN - OCTOBER 07: Republican presidential candidate Sen. John McCain (R-AZ) (R) speaks during the debate with Democratic presidential candidate Sen. Barack Obama (D-IL) (L) at the Town Hall Presidential Debate at Belmont University's Curb Event Center October 7, 2008 in Nashville, Tennessee. Tonight's debate is the second presidential debate of three, the only one being held in the town hall style with questions coming from audience members. (Photo by Anthony Jacobs/Getty Images)
Democratic presidential candidate Michael Dukakis wipes his upper lip during the first presidential debate with his opponent U.S. Vice President George Bush in Winston-Salem, N.C., Sunday night, Sept. 25, 1988. (AP Photo/Bob Jordan)
CLEVELAND, United States: Gwen Ifill (C), moderator of the vice-presidential debate, faces US Vice-President Dick Cheney (L) and Democratic vice-presidential candidate John Edwards 05 October, 2004 during the candidates only face-to-face debate in the 2004 White House race at Case Western Reserve University in Cleveland, Ohio.The vice-presidential debate is focusing on foreign and domestic policies. AFP PHOTO/Jeff HAYNES (Photo credit should read JEFF HAYNES/AFP/Getty Images)
ATLANTA, GA - OCTOBER 13: Vice presidential candidate James Stockdale, an independent candidate, speaks during the debate at Georgia Tech 13 October, 1992 in Atlanta, GA. Stockdale debated Vice President Dan Quayle and Senator Al Gore. (Photo credit should read J. DAVID AKE/AFP/Getty Images)
(Original Caption) Kansas City: Combo of President Reagan and his Democratic opponent, Walter Mondale in their final Presidential debate of the 1984 campaign in Kansas City.
UNITED STATES - CIRCA 2000: Texas Gov. George W. Bush answers a question as Vice President Al Gore looks on during the third and final presidential debate at Washington University in St. Louis. (Photo by Harry Hamburg/NY Daily News Archive via Getty Images)
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This month, Clinton has hunkered down with top aides to study from the comfort of her own home. The bulk of Clinton's prep has been done in and around her house in Chappaqua, New York, partly due to her recent bout with pneumonia.
Following the disclosure of her illness, Clinton took three full days off the trail to recover and read up on briefing books.
And while the campaign is very tight-lipped on specifics, aides say they are preparing for the night to go in several directions.
The candidate herself has often said that she doesn't know "which Donald Trump will show up" to the first debate. Clinton's communications director, Jennifer Palmieri told reporters this week that the campaign is "preparing for the different Trumps that might show up."
At a Hamptons fundraiser last month, the former secretary of state asked the crowd for "thoughts or ideas" on her debate strategy against the Republican nominee. "Maybe he will try to be presidential and try to convey a gravity that he hasn't done before or maybe he will come in and try to insult and try to score some points," she speculated.
Recently, Clinton has vowed to "communicate as clearly and fearlessly" as possible "in the face of the insults and attacks and the bullying and bigotry that we've seen coming from my opponent."
Those familiar with her prep know she needs to be ready to take on any uncomfortable topics that Trump could possibly throw her way, a tactic Trump hasn't shied away from in the past.
Aides argue Clinton has a slight edge because she has so much experience debating one-on-one, whereas Trump spent most of the time in the primary season sharing the stage with many opponents.
The Democratic nominee opted for a fairly light schedule this week in order to practice for the debate. She only traveled to two battleground states — Pennsylvania and Florida — in order to accommodate enough prep time. She's taking full days off the trail Thursday and Friday, unlike her opponent, and has no public events scheduled over the weekend either.
One very guarded secret that has stayed under wraps, so far, is the question of who is playing Trump at these private sessions. Some have hinted that multiple people are taking on the role, in order to best prepare for the different tones Trump may strike.
Palmieri has called the debate stage a "great place" for voters to hear from Clinton in an "unfiltered" way.
The critical calculation will be: How much time can Clinton spend on the offensive debating against someone like Trump who will seek to put her on defense for most of the 90-minute discussion.
Every campaign tries lower expectations for their candidate ahead of a debate, and then pump up their performance afterwards, but Democrats are preparing for the spin wars to be especially important this year in shaping the public image of the debate.
One of Clinton allies' biggest concerns is that Trump will be judged against an unusually low bar, while Clinton will be judged against an impossibly high one. Aides have already started working the refs, urging reporters and pundits to hold Clinton and Trump to the same standard, and her campaign is sure to flood the airwaves with surrogates ready to declare Trump's performance a disaster and shame media figures whom, in their opinion, are too soft on Trump.
As the countdown clock to Monday night's first encounter ticks away, Clinton told radio host Steve Harvey Tuesday that she's ready for a heated encounter on the debate stage.
"I can take it," she said. "I can take that kind of stuff. I've been at this and I understand it's a contact sport."
The Trump team has been largely mum about his debate prep plans. The GOP nominee is often on the trail — usually only taking Sundays as his fully day off — making time dedicated solely to preparation scarce.
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President Barack Obama (L) and Republican presidential nominee Mitt Romney share a laugh at the end of the first presidential debate in Denver, U.S., October 3, 2012. REUTERS/Jim Bourg/File Photo
President Barack Obama answers a question as Republican presidential nominee Mitt Romney listens during the first 2012 U.S. presidential debate in Denver, U.S., October 3, 2012. REUTERS/Rick Wilking/File Photo
U.S. Republican presidential nominee Senator John McCain (R-AZ) (near) answers a question as Democratic presidential nominee Senator Barack Obama (D-IL) looks at him during their debate at Belmont University in Nashville, Tennessee, U.S., October 7, 2008. REUTERS/Jim Young/File Photo
US Republican presidential nominee Senator John McCain (R-AZ) reacts to almost heading the wrong way off the stage after shaking hands with Democratic presidential nominee Senator Barack Obama (D-IL) at the conclusion of their final 2008 presidential debate at Hofstra University in Hempstead, New York, U.S., October 15, 2008. REUTERS/Jim Bourg/File Photo TPX IMAGES OF THE DAY
U.S. Republican presidential candidate John McCain (L) and U.S. Democratic presidential candidate Barack Obama (R) take part in their first 2008 U.S. presidential debate at the University of Mississippi in Oxford, Mississippi, U.S., September 26, 2008. REUTERS/Jim Bourg/File Photo
Texas Governor and Republican presidential candidate George W. Bush (R) and Democratic presidential candidate Vice President Al Gore speak during their presidential debate at the University of Massachusetts in Boston, U.S., October 3, 2000. REUTERS/Peter Morgan/File Photo
Democratic presidential nominee John Kerry (L) makes a point while answering a question during the first presidential debate with U.S. President George W. Bush, at the University of Miami in Coral Gables, Florida, U.S., September 30, 2004. REUTERS/Marc Serota/File Photo
President George W. Bush reacts during responses by Democratic presidential nominee John Kerry during their debate at the University of Miami in Coral Gables, Florida, U.S., September 30, 2004. REUTERS/Jim Young/File Photo
Republican presidential candidate and Texas Governor George W. Bush (L) and Democratic presidential candidate U.S. Vice President Al Gore both gesture toward moderator Jim Lehrer during the town hall-style presidential debate at Washington University in St. Louis, U.S., October 17, 2000. REUTERS/Jeff Mitchell/File Photo
Republican presidential nominee George W. Bush (C) laughs while Democratic presidential nominee Vice President Al Gore (R) and moderator Jim Lehrer (C) respond during the second presidential debate at Wake Forest University in Winston-Salem, North Carolina, U.S., October 11, 2000. REUTERS/Jeff Mitchell/File Photo
Republican presidential nominee Texas Governor George W. Bush (L) and Democratic presidential nominee and Vice President Al Gore debate during the last of three U.S. presidential debates at Washington University in St. Louis, U.S., October 17, 2000. REUTERS/Jeff Mitchell/File Photo TPX IMAGES OF THE DAY
President Bill Clinton (R) strolls away from his podium to talk to the audience as Republican presidential candidate Bob Dole watches during their second and final debate in San Diego, California, U.S., October 16, 1996. REUTERS/Win McNamee/File Photo
Democratic Presidential nominee Governor Bill Clinton (L) Independent candidate Ross Perot (C) and President George Bush laugh at the conclusion of their Presidential debate in East Lansing, Michigan, U.S., October 19th, 1992. REUTERS/Mark Cardwell/File Photo
Democratic presidential candidate Govenor Bill Clinton makes a point as Republican candidate President George Bush disagrees, during their third and final presidential debate in East Lansing, Michigan, U.S., October 19th, 1992. REUTERS/Mark Cardwell/File Photo
President Clinton reaches out to hug his wife Hillary following his debate with Republican presidential candidate Bob Dole at the University of San Diego in San Diego, California, U.S., October 16, 1996. REUTERS/Gary Hershorn/File Photo
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In fact, the weekend leading up to the first debate was originally devoid of campaign events, allowing for debate prep on both Saturday and Sunday but the campaign has now added a rally stop in Virginia for Saturday evening. Trump will do debate prep this weekend with advisers including New Jersey Gov. Christ Christie, campaign CEO Steve Bannon, campaign manager Kellyanne Conway, retired general Mike Flynn and former NYC Mayor Rudy Giuliani.
But while details about his preparation have been rare, the candidate himself has been more than vocal about his views on the moderators (he doesn't think there should be any and is skeptical they'll be fair to him) — and how he'll treat the rival he's sharing the stage with.
In a Monday evening interview with Fox's Bill O'Reilly, Trump said he doesn't think he'll attack Clinton personally, despite his past jabs at Clinton and her husband, Bill, for his past marital indiscretions. "I don't know what I'm going to do that exactly," Trump said. "It depends on what level she hits you with, if she's fair, if it's unfair, but certainly I'm not looking to do that."
Instead, he says he's planning on taking the stage with the intention of being respectful. "If she treats me with respect, I will treat her with respect. It really depends. People ask me that question, 'oh you're going to go out there and do this and that. I really don't know that. You're going to have to feel it out when you're out there. She's got to treat me with respect. I'm going to treat her with respect. I'd like to start off by saying that because that would be my intention."
The GOP nominee has been fond of describing himself as a "counter-puncher," but Trump's debate strategy during the primary seemed simply to keep punching at rivals while reiterating portions of his stump speech. He sparred with nearly every Republican who he shared the stage with throughout the GOP primary process and mostly stayed away from specific policies in lieu of rhetorical red meat for his supporters. And he was generous with his use of nicknames for his opponents: "low energy" Jeb Bush, "lyin' Ted" Cruz and "liddle Marco" Rubio.
And primary debates were always negotiable, not absolutes. When Trump didn't want to debate before the Iowa caucus, he dropped out, questioning Fox New's ability to be fair to him after his comments about one of its lead anchors, Megyn Kelly, having "blood coming out of her wherever."
In fact, whether or not Trump would actually stand center stage during the primaries was often a question. At rallies or in interviews he tended to casually float the idea that he might not show up on the debate stage. In the end, he showed up to all but one.
Now that Trump's in the general, that strategy doesn't seem to have changed that much. When asked Monday night if he'd appear in the debates hosted by CNN's Anderson Cooper and ABC's Martha Raddatz, Trump said he'd "show up" but that "they're gaming the ref" after Matt Lauer was criticized for being too soft on him during NBC's Commander in Chief Forum earlier this month.
"They hit Matt because they said he should have been much tougher. Well, he couldn't have been much tougher. What they are doing is they are gaming the system, like gaming the ref," Trump alleged.
Throughout, Trump maintains that his "whole life has been a debate," which readies him for the approaching moment.