First Lady Michelle Obama Hits the Campaign Trail for Hillary Clinton in Battleground Pennsylvania

Michelle Obama returns to stumping for the Democratic presidential nominee.

PHILADELPHIA— -- The objective of Michelle Obama's first of two stump speeches for Hillary Clinton in battleground Pennsylvania today was clear: hype Clinton and tarnish Donald Trump, while getting young people out to vote.

Within minutes of taking the stage at La Salle University in Philadelphia to an ecstatic, diverse and, largely, young audience of people at or near voting age, Obama moved from laughing with the crowd and cracking jokes to slamming the ongoing "birther" movement.

Trump has since said the president was born in the United States.

"When they go low, we go high," the first lady said today.

Obama added to applause and cheers: "A president cannot just pop off and [act] irrationally."

After a brand-new campaign ad featuring the first lady rolls out this morning, Obama spoke to students and supporters at La Salle this afternoon. From there she was scheduled to head to Pittsburgh for a second Clinton campaign event.

The first lady today echoed past concerns and criticisms of Trump's divisiveness and what she has said are her concerns about the poor example she believes he sets for the nation's children.

She also encouraged young and undecided voters to head to the polls this fall and vote for Clinton.

“Let's face it: Elections aren't about who votes," Obama said at the campaign event here today. "It’s about who doesn’t vote."