WASHINGTON -- U.S. Sen. Cory Booker asked state officials to reject any request from President Donald Trump's voter fraud commission for information about New Jersey voter rolls.

He said comments by Robert Giles, director of New Jersey's division of elections, didn't go far enough.

"I am alarmed by the purpose of this commission: to look into a nonexistent problem of widespread voter fraud as a guise to collect data that is likely to be used to suppress legal voting in future elections and to provide President Trump's outlandish and laughable claim that he actually won the popular vote with some appearance of legitimacy," Booker said.

Booker (D-N.J.) earlier called Trump's campaign comments about voter fraud "a blatant lie" and the commission "a thinly veiled voter suppression effort."

His latest comments came in a letter to Dennis Robinson, serving as acting secretary of state since Lt. Gov. Kim Guadagno has recused herself from all election-related issues while running for governor.

Booker acted after Giles rejected the commission's request for information that went beyond names, addresses and birth dates to include last four digits of Social Security numbers, voting history, felony convictions, military service and registrations in other states.

New Jersey was one of 46 states that rejected the request in all or in part.

"No information has been released nor will any information be released that is not publicly available or does not follow the appropriate legal process for information requests," Giles wrote.

In his letter, Booker cited the "the complete lack of any basis for claims of widespread voter fraud, the privacy and cybersecurity concerns raised by various watchdog groups, and reasonable concerns about the future use of this information" in urging Robinson not to share any information.

Rep. Frank Pallone Jr. (D-6th Dist.) asked Guadagno in a separate letter to also turn down the request.

"Participating in this charade is a waste of time and money, raises substantial privacy concerns, and only lends voice to a false narrative about voter fraud," Pallone said.

The Leadership Conference on Civil and Human Rights, which represents more than 200 civil rights, labor and progressive organizations, on Thursday called the request "an unprecedented overreach and a brazen assault on the founding principles of our democracy."

Trump formed the Presidential Advisory Commission on Election Integrity in May after claiming without evidence that millions of illegally cast ballots caused him to lose the popular vote to Hillary Clinton.

The panel's vice chairman, Kansas Secretary of State Kris Kobach, has been a leading proponent of voter identification laws that are designed to prevent in-person fraud that studies show is very rare.

Such voter-ID laws have been found to prevent citizens, especially poor and minorities, from casting ballots. A federal appeals court threw out a North Carolina voter-ID law, saying the measure targeted blacks "with almost surgical precision."

In New Jersey, the Republican National Committee is under a consent decree, imposed in the wake of the 1981 gubernatorial election, which bars the party from activities that could discourage minorities from going to the polls.

Trump's campaign talk about voter fraud led the Democratic National Committee to unsuccessfully claim that the GOP was violating that court order, which is scheduled to expire this year.

Jonathan D. Salant may be reached at jsalant@njadvancemedia.com. Follow him on Twitter @JDSalant or on Facebook. Find NJ.com Politics on Facebook.