Washington (CNN) President Donald Trump told lawmakers on Thursday he wants to scrap a pay raise for civilian federal workers, saying the nation's budget couldn't support it.

In a letter to House and Senate leaders, Trump described the pay increase as "inappropriate."

"We must maintain efforts to put our Nation on a fiscally sustainable course, and Federal agency budgets cannot sustain such increases," the President wrote.

An across-the-board 2.1% pay increase for federal workers was slated to take effect in January. In addition, a yearly adjustment of paychecks based on the region of the country where a worker is posted -- the "locality pay increase" -- was due to take effect.

Trump said both increases should no longer happen.

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