Five states on Monday joined those refusing to hand over personal voter information to a new White House commission on election fraud, dealing a further blow to President Donald Trump’s effort to validate his unsubstantiated claim that millions voted illegally last year.

Maryland, Delaware, Louisiana, Maine and Wyoming officials joined those in more than 20 other states refusing to hand over part or all of the personal voter data requested by a commission Trump formed to investigate election fraud. The commission is seeking partial Social Security numbers, political party registration, addresses and other details from officials in every state.

Officials in at least half of U.S. states, including some led by Republicans, have now said they will not cooperate with Trump’s commission, at least in part. Some say state law prevents the release of the information, while others have denounced the probe as an attempt to soothe Trump’s ego over losing the popular vote to Hillary Clinton, and as a way to justify further voter-suppression efforts.

“I find this request repugnant,” Maryland Attorney General Brian Frosh (D) said on Twitter. “Repeating a false story of expansive voter fraud, and then creating a commission to fuel that narrative, does not make it any more true.”

I find this request repugnant; appears designed only 2…