GREENVILLE, N.C., Va./WASHINGTON Sept 6 (Reuters) - Republican presidential nominee Donald Trump invoked religion, talked of unifying Americans and tried to raise doubts about whether Democratic rival Hillary Clinton can be trusted in a new campaign stump speech unveiled on Tuesday.
"I will fight for Detroit, for Chicago, for Baltimore, and for every neglected part of this nation - and I will fight to bring us all together as one American people," Trump told a packed rally in Greenville, North Carolina, in a departure from his typical bare-knuckled approach.
On the Democratic side, both Clinton and her vice presidential running mate, Tim Kaine, blasted Trump. Clinton focused on Trump's past bankruptcies and his refusal to release his tax records.
"He clearly has something to hide. We don't know exactly what it is, but we're getting better guesses about what it probably is," she said in Tampa, Florida.
RELATED: Donald Trump and Mike Pence on the campaign trail
Donald Trump and Mike Pence on the campaign trail since the RNC
Donald Trump and Mike Pence on the campaign trail since the RNC
Republican presidential nominee Donald Trump arrives for a rally at Duplin County Events Center in Kenansville, North Carolina on September 20, 2016. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
ESTERO, FL - SEPTEMBER 19: Republican presidential candidate Donald Trump speaks during a campaign rally at the Germain Arena on September 19, 2016 in Estero, Florida. Trump is locked in a tight race against Democratic candidate Hillary Clinton in Florida as the November 8th election nears. (Photo by Joe Raedle/Getty Images)
Republican presidential nominee Donald Trump speaks during a rally at the JetCenters of Colorado in Colorado Springs, Colorado on September 17, 2016. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0534 -- Pictured: (l-r) Republican Presidential Candidate Donald Trump during an interview with host Jimmy Fallon on September 15, 2016 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
Republican presidential nominee Donald Trump speaks at the Bethel United Methedoist Church on September 14, 2016 in Flint, Michigan. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence addresses a news conference with House GOP leaders following a conference at Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Speaker Paul Ryan's reluctance to endorse presidential candidate Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)
Donald Trump, 2016 Republican presidential nominee, greets attendees after speaking at a campaign event in Des Moines, Iowa, U.S., on Tuesday, Sept. 13, 2016. Any path Trump might take to the presidency inevitably leads through the Rust Belt and industrial Midwest the places the Republican nominee describes as 'rusting and rotting' war zones of manufacturing decline. Photographer: Daniel Acker/Bloomberg via Getty Images
NEW YORK, NY - SEPTEMBER 12: (L-R) Chairman and CEO of Cantor Fitzgerald, Howard Lutnick, US Republican presidential nominee Donald Trump, and Executive Managing Director, North America for BGC, Daniel LaVecchia attend Annual Charity Day hosted by Cantor Fitzgerald, BGC and GFI at BGC Partners, INC on September 12, 2016 in New York City. (Photo by Larry Busacca/Getty Images for Cantor Fitzgerald)
AKRON, OH - AUGUST 22: Republican Presidential candidate Donald Trump addresses supporters at the James A. Rhodes Arena on August 22, 2016 in Akron, Ohio. Trump currently trails Democratic Presidential candidate Hillary Clinton in Ohio, a state which is critical to his election bid. (Photo by Angelo Merendino/Getty Images)
FREDERICKSBURG, VA - AUGUST 20: GOP nominee Donald Trump holds a rally in Fredricksburg, VA on August 20, 2016 in Fredericksburg, Virginia. (Photo by Leigh Vogel/WireImage)
US Republican Presidential candidate Donald Trump addresses supporters at the Summit Sports and Ice Complex on August 19, 2016 in Diamondale, Michigan. / AFP / JEFF KOWALSKY (Photo credit should read JEFF KOWALSKY/AFP/Getty Images)
Donald Trump, 2016 Republican presidential nominee, pauses while speaking during a campaign rally at the Erie Insurance Arena in Erie, Pennsylvania, U.S., on Friday, Aug. 12, 2016. Two days after Trump said that President Barack Obama had founded Islamic State, and a day after he insisted that he meant what he said, the Republican presidential nominee reversed himself on Friday and claimed the statement was nothing more than sarcasm. Photographer: Ty Wright/Bloomberg via Getty Images
Donald Trump, 2016 Republican presidential nominee, speaks during a campaign rally at the Erie Insurance Arena in Erie, Pennsylvania, U.S., on Friday, Aug. 12, 2016. Two days after Trump said that President Barack Obama had founded Islamic State, and a day after he insisted that he meant what he said, the Republican presidential nominee reversed himself on Friday and claimed the statement was nothing more than sarcasm. Photographer: Ty Wright/Bloomberg via Getty Images
SUNRISE, FL - AUGUST 10: Republican presidential candidate Donald J.Trump addresses the audience during a campaign event at BB&T Center on August 10th, 2016 in Sunrise, Florida. (Photo by Johnny Louis/WireImage)
WILMINGTON, NC - AUGUST 9: Republican presidential candidate Donald Trump shakes hands with supporters during a campaign event at Trask Coliseum on August 9, 2016 in Wilmington, North Carolina. This was TrumpÃs first visit to Southeastern North Carolina since he entered the presidential race. (Photo by Sara D. Davis/Getty Images)
Donald Trump, 2016 Republican presidential nominee, is seen on a monitor speaking during an event to discuss his economic plans at the Detroit Economic Club in Detroit, Michigan, U.S., on Monday, Aug. 8, 2016. Trump is promising the biggest overhaul to the personal income-tax code since Ronald Reagan, as well as a deep cut in the corporate tax rate. He's also pledging to end excessive regulation and lift restrictions on the nation's energy producers. Photographer: Sean Proctor/Bloomberg via Getty Images
PORTLAND, ME - AUGUST 4: Presidential candidate Donald Trump shakes hands with Maine Gov. Paul LePage being introduced at a rally in Merrill Auditorium on Thursday, August 4, 2016. (Photo by Derek Davis/Portland Press Herald via Getty Images)
COLORADO SPRINGS, CO - JULY 29: Republican presidential nominee Donald Trump waves to supporters after his speech at the Gallogly Event Center on the campus of the University of Colorado on July 29, 2016 in Colorado Springs, Colorado. (Photo by Joe Mahoney/Getty Images)
SCRANTON, PA - JULY 27: Republican presidential candidate Donald Trump speaks to a crowd of supporters on July 27, 2016 in Scranton, Pennsylvania. Trump spoke at the Lackawanna College Student Union Gymnasium. (Photo by John Moore/Getty Images)
DORAL, FL - JULY 27: Republican presidential candidate Donald Trump holds a press conference at Trump National Doral on July 27, 2016 in Doral, Florida. Trump spoke about the Democratic Convention and called on Russia to find Hillary Clinton's deleted e-mails. (Photo by Gustavo Caballero/Getty Images)
Donald Trump, the Republican presidential nominee, waves to the crowd after addressing the 117th annual VFW National Convention at the Charlotte Convention Center on Tuesday, July 26, 2016. (David T. Foster III/Charlotte Observer/TNS via Getty Images)
CHARLOTTE, NC - JULY 26: Republican vice presidential candidate, Indiana Gov. Mike Pence speaks as Republican presidential candidate Donald Trump looks on at the 117th National Convention of the Veterans of Foreign Wars of the United States as veterans strive for a photo at the Charlotte Convention Center on July 26, 2016 in Charlotte, North Carolina. One day after Democrat presidential candidate Hillary Clinton faced the same group, Trump promised a revision to health care for veterans. (Photo by Sara D. Davis/Getty Images)
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Kaine, in a national security speech in Wilmington, North Carolina, criticized Trump's business dealings with Russia, the ties between some of his campaign advisers to the country and Trump's suggestion that he hoped Russian hackers could find missing emails from when Clinton was secretary of state.
"He has openly encouraged Russia to hack his political opponents and commit espionage against his own country," Kaine said.
Trump, in a speech on Wednesday in Cleveland, is to lay out a military preparedness plan in which he will call for rescinding mandatory defense spending cuts and embarking on a major military buildup.
The Trump campaign said the candidate will call for big increases in spending for new ships, planes, submarines and training combat troops and bolstering missile defense systems. Trump will also criticize Clinton for "military adventurism" for her handling of Libya and the Middle East as secretary of state.
Trump, buoyed by polls showing him as gaining ground against Clinton, outlined what he would do on his first day as president if elected on Nov. 8, part of a new effort to inject more discipline into his free-wheeling campaign.
He said he would suspend the resettlement of Syrian refugees into the United States, start toward repealing and replacing President Barack Obama's signature healthcare plan, and begin the first steps toward building a wall along the U.S. southern border with Mexico.
Trump, who rarely mentions religion, quoted from a Bible passage he read aloud at a black church in Detroit on Saturday, part of his effort to appeal to African-American voters.
"Imagine what our country could accomplish if we started working together as one people, under one God, saluting one flag," he added. "It is time to break with the bitter failures of the past, and to embrace a new American future."
THE DESTRUCTION OF EMAILS
But Trump was unflinchingly critical of Clinton over the latest disclosures from the Federal Bureau of Investigation about her use of a private email server and destruction of thousands of emails that she and her staff had deemed of a personal nature.
At least two of her mobile devices were reported destroyed by a staff using a hammer and BleachBit software to wipe unwanted emails.
"People who have nothing to hide don't smash phones with hammers. People who have nothing to hide don't bleach their emails or destroy evidence to keep it from being publicly archived as required under federal law," Trump said.
Kaine, in his first major policy speech since being tapped as Clinton's running mate, drew a contrast between how Trump would approach U.S. relations with Russia and Clinton's track record as head of the U.S. State Department from 2009 to 2013, during Obama's first term as president.
As head of the State Department, Clinton oversaw "hard-nosed negotiations" with Russia to reduce nuclear stockpiles and destroy Syrian chemical weapons, while still going "toe-to-toe" with Putin to protect America and NATO allies, Kaine said. "Trump seems to support Russian interests at the expense of American ones," he added.
Kaine's speech began less than an hour after Trump concluded a campaign stop in Virginia Beach, in Kaine's home state of Virginia, where he scoffed at the idea that Clinton would hold any sway over Putin's actions.
"Putin looks at Hillary Clinton and he laughs. Putin looks at Hillary Clinton and he smiles," Trump said.
The back-and-forth occurred as the focus of the U.S. battle for the White House shifted to national security, with both Clinton and Trump set to participate in a televised forum on Wednesday hosted by a veteran's group.
Trump followed up his Virginia event by meeting with the wives of U.S. military personnel stationed at nearby installations. Setting aside his usual bombast, Trump turned soft-spoken and nodded attentively as the women, some of whom held babies on their laps, described their concerns about the quality of schools and finding jobs.
"So much of this we can take care of," Trump told them.
(Additional reporting by Emily Stephenson in Greenville, Jeff Mason in Tampa and Alana Wise and Ginger Gibson in Washington; Editing by Leslie Adler)