Ahead of a meeting in New Hampshire, the panel's co-chair, Kansas Secretary of State Kris Kobach, made questionable claims that the state allowed nonresidents to vote last year.
Several rights groups are suing President Trump's commission looking into election fraud, saying the panel is skirting a federal law that allows public access to its meetings.
Dozens of pages of public emails, many containing vulgar and mocking language, were published on the website of the residential Advisory Commission on Election Integrity.
The American Civil Liberties Union charges that the commission has failed to meet federal transparency requirements, instead conducting its proceedings under a "cloak of secrecy."
More than a dozen states say that they won't comply with a White House commission request for the personal data. Even a commission leader isn't able to turn over all of his state's records.
No evidence supports the Trump administration's claim that the presidential election was marred by massive voter fraud. But White House adviser Stephen Miller doubled down on the allegations Sunday.
He proposed actions on building a wall along the U.S.-Mexico border, moving toward dismantling Obamacare and even promising a voter fraud investigation. So what can he get done — and not?