Georgetown University’s Center on Education and the Workforce studied the effects of Hillary Clinton’s proposal to make public college free for families earning less than $125,000 dollars a year. Making college free for more than 80 percent of Americans, they’ve found, won’t make enrollment more equal.

This equalizing equation, plus a companion promise to reinstate year-round Pell grants for the poorest students, was central to her speech this afternoon at the University of Southern Florida—addressing that tricky college-age demographic, in that indispensable swing state.