A federal judge refused, for now, to block President Donald Trump's executive order on mail-in ballots. File Photo by Bonnie Cash/UPI | License Photo

May 28 (UPI) -- A federal judge has declined, for now, to block an executive order restricting who can receive mail ballots.

U.S. District Judge Carl Nichols issued the ruling that will keep the March executive order in place, denying a request by the Democratic National Committee and voting rights groups to issue a preliminary injunction to block the order as they challenge it in court.

"The Court recognizes that the Postal Service may ultimately issue a final rule that directly affects Plaintiffs or their members, or that the Government may develop State Citizenship Lists that omit specific individuals due to particularized flaws. Plaintiffs may, of course, renew their motions if and when those future actions occur. Until then, however, Plaintiffs cannot show that preliminary injunctive relief is warranted," Nichols wrote.

The case brought by the DNC and the groups will continue as Democratic lawmakers, civil rights groups and several states and the District of Columbia have also filed lawsuits against the executive order.