President Trump's supporters don't care which woman gets locked up, as long as one of them does.

At a rally in Iowa on Tuesday night, attendees began chanting "lock her up" when Trump referenced Sen. Dianne Feinstein (D-Calif.) and her handling of allegations against Supreme Court Justice Brett Kavanaugh.

The refrain is usually reserved for Trump's onetime opponent, Hillary Clinton. Rallygoers continued the chant long after the 2016 election concluded, but usually still vaguely in reference to Clinton. The latest partisan battle has shifted that: Last week in Mississippi, the crowd began its "lock her up" mantra shortly after Trump mocked Christine Blasey Ford, who testified that Kavanaugh sexually assaulted her when they were in high school.

Crowds targeted Feinstein over the same issue. Trump suggested the senator leaked information about Ford's allegations in an attempt to derail Kavanaugh's confirmation process. After he imitated Feinstein, the Iowa audience launched into its tried-and-true cry for extrajudicial jailing. Upon hearing the chant, Trump laughed. "I think they're talking about Feinstein," he said. "Can you believe it?"

Watch the moment in Iowa below, via ABC News. Summer Meza