President Donald Trump on Sunday claimed that the election for Democratic National Committee chair was “totally rigged” but offered no evidence to back up his allegations.

Trump tweeted that Rep. Keith Ellison (D-MN) “never had a chance.” He did not cite any evidence.

The race for DNC Chairman was, of course, totally “rigged.” Bernie’s guy, like Bernie himself, never had a chance. Clinton demanded Perez! — Donald J. Trump (@realDonaldTrump) February 26, 2017

Democrats elected former Labor Secretary Tom Perez as national party chair on Saturday during a second round of voting. Perez named Ellison deputy chair immediately afterward.

Trump claimed repeatedly during the 2016 election that it was “rigged.” Even after winning the presidency, he continued to push baseless claims that massive election fraud cost him the popular vote.

He was originally scheduled to sign an executive order in January opening a Justice Department investigation into those claims. Trump still has not signed the order.

In January, Trump announced the formation of a commission to “look at” voter fraud, headed by Vice President Mike Pence.

So far, according to the White House, that investigation has consisted of naming a task force.