Donald Trump rallies in Iowa hours before caucuses

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'The Trump Effect' in Iowa: Rally Attendees Share Motivation, Enthusiasm

With just hours to go until Iowa voters head to their polling places to caucus in the first big contest of the 2016 election, Donald Trump is speaking throughout the day in various appearances across the state of Iowa.

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Trump kicked off the Waterloo event on Monday by bringing his family on stage, including his wife Melania and daughter Ivanka, who he joked was perhaps moments away from giving birth.

Ivanka spoke briefly, cheering on her father and the people who support him for the "movement" they have started.

He bragged about his recent endorsements, including Jerry Falwell Jr. and Sheriff Joe Arpaio.

Trump also said that "Christianity is under siege," and vowed to fight back against those efforts.

The rally comes as all eyes are on Trump and his closest rivals, Sen. Ted Cruz and Sen. Marco Rubio, who hope to steal some of the businessman's thunder.

While Trump still holds a lead in Iowa in the latest polls, Cruz has been nipping at his heels and Rubio has seen a recent surge, according to the polling averages from Real Clear Politics.

Trump lashed out at Cruz Monday morning, questioning his ability to serve as president again amid questions over his citizenship. Cruz, who was born in Canada, has insisted that his mother's American citizenship status automatically qualified him as a "natural-born citizen" as the Constitution requires all presidents to be.

See photos of Trump's recent event, from when he skipped the debate:

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Donald Trump's Iowa Rally at the same time as GOP debate
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Donald Trump rallies in Iowa hours before caucuses
Republican presidential candidate Donald Trump speaks at a event at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidates Rick Santorum, left, and Donald Trump, center, laugh as they listens to Mike Huckabee during a campaign event on the campus of Drake University Thursday, Jan. 28, 2016, in Des Moines, Iowa. (AP Photo/Jae C. Hong)
Republican presidential candidate Donald Trump arrives at a campaign event on the campus of Drake University Thursday, Jan. 28, 2016, in Des Moines, Iowa. (AP Photo/Jae C. Hong)
Republican presidential candidate Donald Trump speaks at a event at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidates Donald Trump, center, and Mike Huckabee, left, applaud while listening to Rick Santorum during a campaign event on the campus of Drake University Thursday, Jan. 28, 2016, in Des Moines, Iowa. (AP Photo/Jae C. Hong)
Republican presidential candidate Donald Trump applauds as Treasure Island Casino owner Phil Ruffin speaks, along with his wife, Oleksandra Nikolayenko, at a event in support of veterans at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidate Donald Trump waves at a event at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidate Donald Trump laughs as Republican presidential candidate Rick Santorum jokes about not being photographed in front of a Trump podium sign at a event in support of veterans at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidate Donald Trump appears on stage with fellow candidates Mike Huckabee, left, and Rick Santorum at a Trump event in support of veterans at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidate Donald Trump speaks at a event at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Donald Trump speaks during a campaign rally raising funds for US military veterans at Drake University in Des Moines, Iowa on January 28, 2016. US Republicans scrambling to win the first contest in the presidential nomination race were gearing for battle at high-profile debate in Iowa, but frontrunner Donald Trump is upending the campaign by defiantly refusing to attend. Trump's gamble has left the presidential race in uncharted waters just days before Iowans vote on February 1, insisting he will not back down in his feud with debate host Fox News.Instead, the billionaire has doubled down, hosting a rogue, rival event for US military veterans at the same time that his own party is showcasing its candidates for president to all-important Iowa voters. / AFP / William EDWARDS (Photo credit should read WILLIAM EDWARDS/AFP/Getty Images)
Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, waves during a campaign event in Des Moines, Iowa, U.S., on Thursday, Jan. 28, 2016. Trump, according to a flurry of early-state and national polls, is the overwhelming favorite of self-identified moderate and liberal Republican voters. Among more conservative voters, he often trails his chief rival for the nomination, U.S. Senator Ted Cruz. Photographer: T.J. Kirkpatrick/Bloomberg via Getty Images
Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, speaks during a campaign event in Des Moines, Iowa, U.S., on Thursday, Jan. 28, 2016. Trump, according to a flurry of early-state and national polls, is the overwhelming favorite of self-identified moderate and liberal Republican voters. Among more conservative voters, he often trails his chief rival for the nomination, U.S. Senator Ted Cruz. Photographer: T.J. Kirkpatrick/Bloomberg via Getty Images
Protesters, left, are confronted by supporters during a campaign event for Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, in Des Moines, Iowa, U.S., on Thursday, Jan. 28, 2016. Trump, according to a flurry of early-state and national polls, is the overwhelming favorite of self-identified moderate and liberal Republican voters. Among more conservative voters, he often trails his chief rival for the nomination, U.S. Senator Ted Cruz. Photographer: T.J. Kirkpatrick/Bloomberg via Getty Images
Melania Trump, wife of Republican presidential candidate Donald Trump, waves, at event in support of veterans at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidate Donald Trump speaks at a event at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
Republican presidential candidate Mike Huckabee waves to attendees before the start of a veterans event with Republican presidential candidate Donald Trump at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
People cheer before the arrival of Republican presidential candidate Donald Trump for at a rally at Drake University in Des Moines, Iowa, Thursday, Jan. 28, 2016. (AP Photo/Andrew Harnik)
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Trump, however, says it's not entirely clear that the legal argument Cruz makes is legitimate.

"That's a big cloud over his head, and I say he should try and remove that cloud by asking for a declaratory judgement to the courts," Trump said Monday morning during an appearance on TODAY. Numerous lawyers have come out saying that he's not allowed to run, he's not allowed to serve as president. That's a tough thing, and I think that's affected him quite a bit by a lot of people, frankly."

See more of Trump's interview:

Donald Trump: Cruz Should Get 'Declaratory Judgment' on Eligibility to Run

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