Tim Canova announced this week another run for office to unseat Rep. Debbie Wasserman Schultz, D-Fla., in 2018, but his second challenge in two years may be complicated after he floated a conspiracy theory about a former Democratic National Committee staffer who was murdered last year.

"I'm a candidate again," Canova said Thursday evening at an event in Florida.

Canova lost to Wasserman Schultz in a 2016 primary contest for Florida's 23rd Congressional District that represented a sort of rematch of the 2016 presidential primaries. Canova was backed by progressive Sen. Bernie Sanders while Hillary Clinton had endorsed Wasserman Schultz.

The Florida congresswoman had been the chairwoman of the Democratic National Committee up until last summer, when she stepped down after WikiLeaks published stolen DNC emails showing that she and other DNC officials worked to undermine Sanders in favor of Clinton.

The Miami Herald notes that Canova waded into some controversy in January when he floated the conspiracy theory that Seth Rich, a former DNC staffer who was murdered last summer, may have been the WikiLeaks source for the DNC leak and that was why he was killed.

Rich "may have been the Wikileaks source of the leaked DNC emails. He was gunned down, assassinated under suspicious circumstances just days after publication of those leaked emails," Canova said in a Facebook post that is now deleted.

When asked about whether he thinks Rich was the DNC leaker on Thursday, Canova walked back his prior statement, saying "I have no idea" and blamed the media for their portrayal of him on the issue.

Rich's parents have denied that their son was the DNC leaker and have asked people to stop politicizing his death.