The problem is anyone can claim to be a Christian.
George W Bush, Nancy Pelosi, and Hillary all claim to be Christians.
I don’t know about the authors of the letter.
The question is would you trust The Hill to determine true Christians from a fake ones?
“...to determine true Christians...”
Well one person who is definitely NOT is Vladimir Putin.
And while Trump is not Jesus, I do believe a healthy, spiritual-discerning observer can attest that he has the best interests of believers at heart and is surrounded by many who do. AND that Trump has been rightfully critical of former U.S. policy in the region.