FAIRFAX, Va. — Stepping deeper into the political fray, Michelle Obama warned young voters against being “tired or turned off” in the 2016 election. She urged them to rally behind Hillary Clinton, “particularly given the alternative.”

Obama is emerging as one of Clinton's most effective advocates, especially with voters who backed President Barack Obama but are less enthusiastic about his potential Democratic successor. The Clinton team's biggest challenge regarding Obama is getting the reluctant campaigner to commit to more events.

The rally Friday in Virginia was Obama's first solo campaign event for Clinton and comes nearly two months after her star turn at the Democratic convention. She repeatedly jabbed Trump without mentioning him by name, declaring that being president “isn't anything like reality TV.”

The first lady pointedly called out those who continue to question the president's citizenship “up to this very day.” Drawing on a frequently quoted line from her convention speech, Obama said her husband had responded to those questions by “going high when they go low.”

Hours earlier, Trump stated for the first time that the president was born in the United States, though he did not apologize for devoting years to promoting false allegations that Obama was not an American citizen.

Beyond her ability to take on Trump with a smile, Obama's real value to Clinton is her wild popularity with Democratic voters, particularly young people and blacks. She vouched repeatedly for Clinton's resume and character, urging voters motivated by her husband's history-making campaigns to feel the same way about the first woman nominated for president by a major U.S. party.

“When I hear folks saying that they don't feel inspired in this election, well let me tell you, I disagree — I am inspired,” Obama said.

Clinton aides want her in battleground states as much as possible between now and Election Day. Friday's rally in northern Virginia, less than an hour drive from the White House, is the only event she's publicly committed to, though the Clinton campaign expects her to make additional appearances.

Clinton herself has started referencing Obama in her campaign remarks, using her convention address as a guidepost for what she promises will be a more aspirational finish to her campaign.