A voter data expert who was hired by the Trump campaign in 2020 to look for voter fraud criticized claims by House Speaker Mike Johnson (R-La.) about election integrity Friday. 

“Speaker Johnson is an attorney, and he should know better,” Ken Block told CNN anchor Jim Sciutto during a Friday appearance on “Erin Burnett OutFront”. “He should understand that hearsay evidence… what he’s talking about, does not stand up in court and it should not ever rise to the level that it is right now, where we’re impugning our election integrity and our infrastructure, based on hearsay, which is what he’s doing.”

Johnson has previously backed former President Trump’s unfounded claims that the 2020 election was stolen.

“I have just called President Trump to say this: ‘Stay strong and keep fighting, sir! The nation is depending upon your resolve. We must exhaust every available legal remedy to restore Americans’ trust in the fairness of our election system,” Johnson said in a post to social platform X the day after the 2020 election.

Johnson also headed up an amicus brief signed by more than 100 House Republicans backing a filed by Texas to the U.S. Supreme Court that aimed to overturn the 2020 election results in states including Georgia, Michigan, Pennsylvania and Wisconsin.

Johnson and Trump appeared together for a press conference at the former president’s Mar-a-Lago resort, where they unveiled a bill that would bar those who are not U.S. citizens from voting, something that is already illegal. In the press conference, Trump said Johnson is “doing a very good job” when asked about a motion to oust Johnson from his current role as Speaker by Rep. Marjorie Taylor Greene (R-Ga.).

“I think he’s doing a very good job, he’s doing about as good as you’re going to do and I’m sure that Marjorie understands that,” he continued. “She’s a very good friend of mine and I know she has a lot of respect for the Speaker.”