The Secret Service said Thursday it will investigate comments made by Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE’s longtime butler calling for President Obama to be killed.

“The U.S. Secret Service is aware of this matter and will conduct the appropriate investigation,” agency spokesman Robert Hoback said in a statement.

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Anthony Senecal, who worked as a butler to the presumptive GOP presidential nominee for 17 years, until 2009, wrote in a recent Facebook post that Obama should be shot by the military as an “enemy agent.”

"To all my friends on FB, just a short note to you on our pus headed "president" !!!! This character who I refer to as zero (0) should have been taken out by our military and shot as an enemy agent in his first term !!!!!" Senecal said in a Facebook post, according to Mother Jones.

"Instead he still remains in office doing every thing he can to gut the America we all know and love !!!!!"

The left-leaning magazine revealed that Senecal, who now works as the in-house historian at Trump's Mar-a-Lago estate in Florida, has made multiple Facebook posts calling for Obama’s death. Senecal confirmed to Mother Jones that he had written the posts.

Last April, he wrote that the president should be hanged.

“Looks like that sleezey bastard zero (O) is trying to out maneuver Congress again, if the truth be known this prick needs to be hung for treason!!!” he said.

Like Trump, Senecal also argued that Obama is not a United States citizen and is ineligible to serve as president.

The White House released Obama’s birth certificate in 2011 proving he was born in Hawaii.

Trump's campaign later Thursday disavowed Senecal's comments.

-- Updated at 5:25 p.m.