President Trump has ordered the EPA to roll back limits on the amount of ethanol blended into gasoline, in a move that will benefit big agribusiness companies. Trump announced the ethanol rule change at a campaign rally in Iowa Tuesday evening, where he appealed to his Republican base to turn out during next month’s midterm elections.

At the rally, Trump mocked California Democratic Senator Dianne Feinstein, claiming she leaked a letter written by professor Christine Blasey Ford alleging Supreme Court Justice Brett Kavanaugh tried to rape her when they were teenagers. Trump then laughed as his supporters chanted, “Lock Her Up!”—referring not to Hillary Clinton, but to Senator Feinstein.

President Donald Trump: “How about Senator Feinstein? That’s another beauty. [crowd boos] That’s a beauty! Did you leak the documents? Huh? Huh? What? What? No, I didn’t do. Did we leak? Did we leak? No, no, no, we didn’t. Did you ever see? No—she goes, no—he just said, no, we didn’t leak.”

Audience: “Lock her up! Lock her up! Lock her up! Lock her up! Lock her up!”

In an unusual move, Trump wrote an op-ed Wednesday in USA Today asking Americans to vote for Republicans in the midterm elections. Trump wrote, “The new Democrats are radical socialists who want to model America’s economy after Venezuela. If Democrats win control of Congress this November, we will come dangerously closer to socialism in America.”