More than 140 House Democrats are urging President Trump to reconsider a memo reinstating a ban on transgender people serving in the military.

In a letter to Trump dated Aug. 29, the group of House Democrats slammed the president's claim that transgender service members are a hindrance to the U.S. military's effectiveness and cast the ban as unconstitutional.

"Implicitly, your ban denies the value of transgender servicemembers, and it questions the professionalism of those who serve beside them," the letter reads.

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The letter also casts the move as a hasty decision made without proper consultation with top national security or defense officials.

"We urge you again to join us in honoring all those who protect our nation; to fully respect the rights of the citizens you serve; and to reconsider the ill-advised and indefensible policy that you have moved to implement," it reads.

The letter came four days after Trump signed an executive memo directing the Pentagon to stop accepting transgender people into the military.

The memo does not instruct the Pentagon to dismiss transgender people currently serving in the military, but directs Defense Secretary James Mattis James Norman MattisBiden courts veterans amid fallout from Trump military controversies Trump says he wanted to take out Syria's Assad but Mattis opposed it Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE to figure out how to handle such service members.

The memo made good on Trump's announcement last month that he would reinstate a ban on transgender military service that ended last year under the Obama administration.

The decision has spurred criticism from lawmakers from both sides of the aisle, while many social conservatives have praised the move.

Among the Democrats to sign the letter Tuesday were House Minority Whip Steny Hoyer (Md.) and Rep. Joseph Crowley (N.Y.), the chairman of the House Democratic Caucus.