The first Jewish American president

Trump | 'The Snake'
According to a 2019 report released by the 'Israel Times', Donald Trump converted to Judaism two years prior in 2017.

https://web.archive.org/web/20190531052037/https://israeltodaynews.blogspot.com/2019/02/donald-trump-converted-to-judaism-two-years-ago.html

To convert to Judaism from Christianity, one must profess that Christ is not the Messiah and betray the Son of God.

I cannot confirm that Trump himself has converted to Talmudic Judaism, however, it is worth noting his close ties to Chabad of which his daughter Ivanka and her husband Jared Kushner are both members of. Ivanka is also a WEF Young Global Leader.
Other article from the Times of Israel cane found here:
https://blogs.timesofisrael.com/donald-trump-americas-first-jewish-president/