He is not. A Muslim is a person that believes in G-d and a divine law (a false one, but a law nonetheless).
Mr. V does not believe. He is the son and prodigy of radical atheists.
As the Mishna expressly states, at the End of Days, “All governments (malcut) will turn to heresy and non-belief (minot).” (Sotah 9:15)
Mr. V is the first American president who is a non-believer.
The United States has become the finall major world power whose government has completely turned to heresy and non-belief.
For the first time in history, the words of the Mishna in Sota have come to pass.
But while Mr. V is not Muslim, he is intimately connected to Yishmael.
Mr. V is well characterized as a “Yishmaelite non-believer“.
Now THAT is really scary!