Rep. Mary Miller ― a Republican from Illinois who once praised Adolf Hitler ― wrote, edited and ultimately deleted a social media post decrying “a Muslim” speaking in Congress.

“It’s deeply troubling that a Muslim was allowed to lead prayer in the House of Representatives this morning. This should have never been allowed to happen,” she wrote Friday. “American was founded as a Christian nation, and I believe our government should reflect that truth. May God have mercy!”

The man leading the prayer was guest chaplain Giani Singh, a follower of the Sikh faith, not Islam. Miller’s Republican colleague Rep. Jeff Van Drew (N.J.) introduced him as such on Friday.