Speaking her mind. Michelle Obama slammed Donald Trump during a rally at La Salle University in Philadelphia on Wednesday, September 28, telling the audience, made up largely of students, that the Republican presidential candidate is unfit for the White House.

“Transitions like these can be difficult,” she said, referring to the current election season. “They can involve a lot of uncertainty. We saw that back in 2008 when Barack was first elected. I don’t know if you all remember … but back then, people had all kinds of questions about what kind of president Barack would be. Things like, ‘Does he really understand us?’ ‘Will he protect us?’ And then, of course, there are those who questioned — and continued to question for the past eight years — whether my husband was even born in this country.”

Michelle was, of course, addressing Trump’s repeated insistence that President Barack Obama was not a natural-born citizen of the United States, a dogged assertion that became known as the birther movement.

“And let me say, [these were] hurtful, deceitful questions deliberately designed to undermine his presidency,” Michelle, 52, continued. “Questions that cannot be blamed on others or swept under the rug by an insincere sentence at a press conference. Let me take a moment. … Because when making life or death, war or peace decisions, a president just can’t pop off. Or lash out irrationally. No. We need an adult in the White House.”

The first lady then tackled a few of the more controversial points from Monday night’s first presidential debate between Trump and Democratic presidential nominee Hillary Clinton.

“So if a candidate is erratic and threatening; if a candidate traffics in prejudice, fears and lies on the campaign trail; if a candidate thinks that not paying taxes makes you smart, or that it’s good business when people lose their homes; if a candidate regularly and flippantly makes cruel and insulting comments about women, about how we look, how we act — well sadly, that’s who that candidate really is. That is the kind of president they will be,” she told the crowd.

“And trust me, a candidate is not going to suddenly change once they’re in office,” she concluded. “Just the opposite, in fact. Because the minute that individual takes that oath, they are under the hottest, harshest light there is, and there’s no way to hide who they really are.”

Also on Wednesday, President Obama, 55, sat down with Steve Harvey to chat about the debate, pointing out that Monday night’s event made it even more evident that the 70-year-old real estate mogul “appears to only care about himself.”

“You had somebody who basically insulted women and then doubled down,” the president said on Harvey’s radio show. “In terms of how he talks about them and talks about their weight and talks about how they look instead of the content of their character and their capabilities, which is not something that I want, not somebody I want in the Oval Office.”

On Monday, Clinton, 68, called out Trump during the debate for once making insulting, sexist comments about former Miss Universe Alicia Machado, by calling her “Miss Piggy” and “Miss Housekeeping.”

“You know, with 18 years old, when you are growing up, that was horrible for me,” Machado, the former Miss Venezuela, said of Trump on the Today show on Wednesday. “My self-esteem [was] on the floor.”

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