En Toutō Nika

Donald Trump was just compared to Constantine.

Some Historical context:
Constantine, the Roman Emperor, had a vision before the Battle of the Milvian Bridge on October 27, 312 AD. According to various accounts, he saw a cross of light in the sky with the Greek inscription "En toutō nika" (In this, conquer) or the Latin "In hoc signo vinces" (By this sign, you shall win).

That night, Christ appeared to Constantine in a dream, instructing him to use the sign of the cross in all future battles, which would lead to victory.
Constantine followed this vision and had the Chi-Rho symbol, the first two letters of Christ's name in Greek, painted on his soldiers' shields.

The battle itself took place on October 28, 312 AD, and Constantine emerged victorious, leading to the end of the Tetrarchy and his sole rule over the Roman Empire.
This event is often seen as the beginning of Constantine's conversion to Christianity.