President Donald Trump says he’d like Spencer Pratt to succeed in his Los Angeles mayoral bid … because he’s heard the candidate is a Trump loyalist, through and through.

POTUS was asked about Pratt — a fellow reality star running for office just like DJT himself back in 2015 — at Joint Base Andrews in Maryland on Wednesday morning … and he says he’d like to see SP do well, since he’s heard Pratt’s a MAGA supporter.

Trump notes he doesn’t know the reality star personally … but as long as Pratt’s rocking with him, he’s rocking with Pratt.

Spencer did not exactly embrace the support in a heavily Democratic city, telling TMZ, “Everybody wants me to succeed because L.A. is the most important city in the country,” adding, “The only support I need is from moms that wanna feel safe in Los Angeles. I’m laser focused on that.”

The Prez notes it won’t be easy for Pratt to win in California … claiming the people who run the elections are dishonest — and even making a strange comment about needing Jesus Christ to come down from Heaven and combat Democrat dishonesty.

We’ve been all over Spencer’s run for mayor … highlighting his attacks on incumbent Mayor Karen Bass and CA Governor Gavin Newsom — both of whom are on Trump’s you-know-what list.