Mrs. Trump's appearance was a sharp contrast to most of the night's other speakers, who painted a bleak picture of an American future that they said only her husband can correct. The evening's "Make America Safe Again" theme took on new resonance given the nation's unsettlingly violent summer.

A parade of speakers told detailed stories about deadly combat missions and loved ones killed at the hands of people in the United States illegally. And they cast the turbulent times as a direct result of weak leadership by President Barack Obama and Democratic nominee Hillary Clinton, who spent four years in the administration.

"Who would trust Hillary Clinton to protect them? I wouldn't," Former New York City Mayor Rudy Giuliani said in one of the night's most fiery addresses.

Many of the party's past and future stars were glaringly missing from the lineup, underscoring the concerns some GOP leaders have with closely aligning themselves with Trump. The businessman has cast aside decades of Republican orthodoxy in his unexpected political rise, creating a crisis within the GOP about its future.

Republican divisions erupted briefly on the convention floor Monday afternoon after party officials adopted rules by a shouted voice vote. Anti-Trump forces seeking to derail his nomination responded with loud and angry chants, though they were quickly quieted and there were no lingering signs of the protests as delegates returned to the cavernous convention hall for the evening program.

Trump hoped the chaos would be little more than a footnote. Despite persistent party divisions, his campaign is confident Republicans will come together behind their shared disdain for Clinton.

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Convention speakers highlighted at length the deadly 2012 attacks on Americans in Benghazi, Libya, while Clinton was serving as secretary of state. The mother of one of the victims choked back tears as she personally blamed Clinton for her son's death and accused her of giving a false explanation for the attack.

"If Hilary Clinton can't give us the truth, why should we give her the presidency," Pat Smith said.

The convention comes amid a wrenching period of violence and unrest, both in the United States and around the world. In a matter of weeks, Americans have seen deadly police shootings, a shocking ambush of police in Texas and escalating racial tensions, not to mention a failed coup in Turkey and gruesome Bastille Day attack in Nice, France. Three police officers were killed in Baton Rouge, Louisiana, on the eve of the convention's opening day.

Convention speakers relentlessly cast the troubling times as a result of ineffective leadership by President Barack Obama and Clinton, who spent four years in his administration.

"Hillary Clinton cannot be trusted. Her judgment and character are not suited to be sitting in the most powerful office in the world," said Sen. Joni Ernst, R-Iowa. Ernst is one of the Republican Party's rising stars, but the speaking schedule had her appearing late in the night before a nearly empty hall.

Trump has been vague about how he would put the nation on a different course, offering virtually no details of his policy prescriptions despite repeated vows to be tough.

Campaign chairman Paul Manafort said Trump would "eventually" outline policy specifics but not at the convention. However, Trump said in a Monday night interview with Fox News that his convention speech Thursday would discuss a "major, major" tax cut, immigration, getting rid of burdensome regulations and taking care of veterans.

The line-up of speakers and no-shows for the four-night convention was a visual representation of Trump's struggles to unify Republicans. From the party's former presidents to the host state governor, many leaders were staying away from the convention stage, or Cleveland altogether, wary of being linked to a man whose proposals and temperament have sparked an identity crisis within the GOP.

Trump's team insists that by the end of the week, Republicans will plunge into the general election campaign united in their mission to defeat Clinton. But campaign officials undermined their own effort Monday by picking a fight with Ohio Gov. John Kasich, who is not attending the convention and has yet to endorse Trump."

Manafort, in remarks to reporters at a Bloomberg breakfast, called Kasich "petulant" and said the governor was "embarrassing" his party in his home state.

Even some of those participating in the convention seemed to be avoiding their party's nominee. When House Speaker Paul Ryan spoke to Wisconsin delegates Monday morning, he made no mention of Trump in his remarks.

Ryan, asked at a later event whether Trump was really a conservative, said: "Define conservative; he's not my kind of conservative."

The Delegates Decide their Rules and Platforms

The biggest assignment that delegates had on their hands Monday was voting on their party's platforms and the rules of the convention, both of which were lined up in the rules committee meetings last week.

Hundreds of socially conservative delegates opposed to nominating Trump bellowed in outrage after the convention's presiding officer, Arkansas GOP Rep. Steve Womack, abruptly put the rules to a vote and declared them approved by voice, not an individual tally of each state's delegation.

Though likely to lose, the dissidents had demanded a roll call, a slow-moving vote that they hoped would underscore their claims that party leaders were unfairly railroading through rules that give too much clout to the GOP hierarchy. Top Republicans and Trump campaign officials wanted to avoid such a scenario, and ended up contending with a shorter but more raucous display of fury.

"Call the roll, call the roll," opponents shouted. Practically drowning them out were chants of "USA, USA" by Trump supporters and party loyalists.

Minutes later, Womack had the convention vote by voice again, with both sides again shouting their votes lustily. Once again, he said, the rules' supporters had prevailed.

The defeated mavericks reacted angrily, with some delegates leaving the convention floor and others vowing to not help Trump. Gary Emineth, a North Dakota delegate and GOP donor who was part of the insurgency, said he would resign from a fundraising operation.

Security Heightened for the Convention

Security around the Republican National Convention has been an area of concern for law enforcement officials for weeks, and recent domestic and world events have heightened those concerns in the days leading up to the start.

Thousands of law enforcement officers were ordered to Ohio even before the fatal shootings of police officers in Baton Rouge, Louisiana. After yet another tragedy, the head of Cleveland's largest police union called for an emergency action to be taken to ban the state's open carry laws during the convention.

Still, Cleveland Police chief Calvin Williams stressed officers are "prepared for anything and everything" that could potentially happen.