President Obama would like to see more women in the corner office. He would also like to remind you that he happens to have a corner office. Well, not so much a corner, but an oval. And he'd like to see one woman in particular occupy it.

Less than a week after he formally endorsed her, President Obama is stumping aggressively for Hillary Clinton. And he chose a fitting place to do it: The White House's first-ever United State of Women Summit.

This election is shaping up to be the biggest battle of the sexes in US political history. Clinton, the first woman to become a major party's presumptive nominee, is facing off against Donald Trump, a candidate who is wildly—even historically—unpopular with women. It's in the Clinton campaign's best interest, and arguably in the best interest of Obama's legacy, to energize as many women as possible this election.

Obama's remarks today addressed the totality of his own record on women's issues—from signing the Lily Ledbetter Fair Pay Act as soon as he took office to pushing for free birth control access in the Affordable Care Act. But through it all, the subtext was that none of that will matter if the United States elects Trump in November.

"We have to remember that progress is not inevitable. It’s the result of decades of slow, tireless, often frustrated, and unheralded work," Obama said. "People like Hillary Clinton have raised the expectations of our daughters and our sons for what is possible."

It's the second time the president has marched into the political fray today. Earlier, in an address at the Treasury Department, he eviscerated Trump for his comments in the wake of the deadly mass shooting in Orlando this weekend. Obama dismissed Trump's frequent calls for the president to use the term "radical Islamic terrorism," saying, "There’s no magic to the phrase 'radical Islam.' It’s a political talking point, it’s not a strategy."

Pluralism and Tolerance

Obama also challenged Trump's attitude toward the Muslim community both in the US and abroad. "Are we going to start treating all Muslim-Americans differently?" he asked. "Are we going to start subjecting them to special surveillance? Are we going to start discriminating against them because of their faith?"

President Obama avoided naming Trump directly on stage at the Women's Summit, but he did allude to the events in Orlando, explaining that violence and suppression of women worldwide is intricately linked to the rise of terrorism around the world.

"This is a national security issue," he said. "The ideology that leads Boko Haram to kidnap school girls, and leads ISIL to enslave and rape women, it’s the same ideology that leads to instability and violence and terrorism."

Obama said these ideologies pose a threat to the "pluralism and tolerance" that exists in the United States. "There's a connection there," he said. "So we need to be clear about what we’re about, what we stand for."

This week, Trump has redoubled his commitment to banning Muslim immigrants, officially banned The Washington Post from his events, and said as president, he would reserve the right to ban any person or group who he "deems detrimental to the interests or security of the United States"—raising the question of how tolerant the US really is. Obama's clear goal was to hold Clinton up as the candidate who would preserve those values.

Trump, meanwhile, has taken in recent days to claiming he would be a bigger champion for women than Clinton. Yesterday, in a speech about the Orlando shooting, he asked, "Who is really the friend of women and the LGBT community? Donald Trump with actions or Hillary Clinton with her words?” Which actions he means isn't really clear. But it's sure a lot of words.