Los Angeles mayoral candidate Spencer Pratt, the former reality TV personality, slipped into third place in the official vote count late on Sunday, prompting unsubstantiated claims by U.S. President Donald Trump and others that something irregular was taking place.

Trump administration launched a federal probe as Republicans fall behind in California primaries.

A Los Angeles-based Justice Department official late Friday debunked a baseless claim of a discrepancy in the vote count of the city’s mayoral race that has circulated on social…