WASHINGTON (AP) -- The first presidential debate between Democrat Hillary Clinton and Republican Donald Trump is under way. Clinton was heard asking, "How are you, Donald?" as they took the stage.
Clinton, a former senator and secretary of state, is banking on voters seeing her as a steady hand who can build on the record of President Barack Obama, whose popularity is rising as he winds down his second term in office. She's called for expanding Obama's executive orders if Congress won't pass legislation to overhaul the nation's immigration system and for broader gun control measures. Overseas, she's called for a no-fly zone in Syria but has vowed to keep the military out of a large-scale ground war to defeat the Islamic State group.
For Clinton, victory in November largely hinges on rallying the same young and diverse coalition that elected Obama but has yet to fully embrace her. Her campaign manager, Robby Mook, told "CBS This Morning" on Monday that she fully understood she still needs to earn voters' trust.
"When she's had the opportunity to talk about not just what her plans are to make a difference in people's lives, but how this campaign is really part of a lifelong mission to fight for kids and families, she's done really well," Mook said.
Trump has tapped into deep anxieties among some Americans, particularly white, working-class voters who feel left behind in a changing economy and diversifying nation. While the real estate mogul lacks the experience Americans have traditionally sought in a commander in chief, he's banking on frustration with career politicians and disdain for Clinton to push him over the top on Election Day.
Trump's campaign manager, Kellyanne Conway, said Monday that she saw her candidate as "ready for tonight."
That natural connective tissue he has with people, and his ability to communicate directly with people through the noise -- or through the silence, whatever the case may be -- will be on display tonight," Conway said.
The centerpiece of Trump's campaign has been a push for restrictive immigration measures, including a physical wall along the U.S.-Mexico border and an early proposal to temporarily bar foreign Muslims from coming to the U.S. But he's been less detailed about other ideas, including his plan for stamping out the Islamic State group in the Middle East, and Conway suggested he'd be similarly coy in Monday's debate.
"You will get his view of how best to defeat the enemy -- without telling ISIS specifically what it's going to be," Conway said on MSNBC, using another acronym for IS.
Clinton's camp is worried that Trump will be held to a different standard in the debate and is particularly concerned that the notoriously hot-headed businessman will be rewarded for simply keeping his cool. Clinton backers have been publicly pushing moderator Lester Holt of NBC News to fact-check Trump if he tries to mislead voters about his record and past statements.
"We also are concerned that Trump is going to continue to lie," Mook said.
The billionaire's advisers have indeed been urging him to keep calm on stage, mindful of voters' concerns about his temperament. On Saturday, Trump showed a glimpse of the traits his advisers want to keep in check, announcing on Twitter that he might extend a debate invitation to Gennifer Flowers, a woman who had an affair with Clinton's husband, former President Bill Clinton.
Trump's campaign said the candidate was responding to Clinton's decision to invite businessman and Trump critic Mark Cuban to the debate, and that Trump floated the invitation to remind people of his ability to punch back. By Sunday, his campaign said Flowers would not be attending.
Trump was often a commanding presence in the Republican primary debates, launching biting personal attacks on his rivals. But at times, he appeared to fade into the background, especially during more technical policy discussions -- something he'll be unable to do with just two candidates on stage.
Clinton has debated more than 30 times at the presidential level, including several one-on-one contests against Obama in 2008 and Vermont Sen. Bernie Sanders in 2016. But Monday's contest will be her first presidential debate against a candidate from the opposing party.
Associated Press writer Josh Lederman contributed to this report.