(CNN) "Lock her up!" the crowd at President Donald Trump's campaign rally in Toledo, Ohio, on Thursday night chanted. "You should lock her up, I'll tell you," Trump agreed.

The "her" is Hillary Clinton. The crime for which the 2016 Democratic presidential nominee should allegedly be imprisoned isn't clear. But the chant has become a regular part of the circus-like atmosphere at Trump rallies, a sort of calling card for the movement.

Here's something else that happened on Thursday night: The Trump Justice Department closed its 2-year long probe into Clinton's business dealings -- including whether the Clinton Foundation received special treatment during the former first lady's time as Secretary of State under President Barack Obama. That includes an allegation made by Trump (and some other conservatives) that Clinton had somehow steered a uranium deal to the Russians after a donation to the Clinton Foundation.

"Remember that Hillary Clinton gave Russia 20 percent of American uranium and, you know, she was paid a fortune," Trump said on the campaign trail in October 2016 . "You know, they got a tremendous amount of money."

That wasn't true then. And now an investigation authorized by then-Attorney General Jeff Sessions to look into potential wrongdoing by Clinton has turned up a total of zero wrongdoing of any sort by either Hillary or Bill Clinton -- or anyone associated with the Clinton Foundation.

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