George Whitesides, the former NASA chief of staff, defeated Representative Mike Garcia, a Republican, flipping a hotly contested seat in the northern suburbs of Los Angeles.

Trump is expected to make Marco Rubio his secretary of state, make Kristi Noem his secretary of homeland security and name Stephen Miller and Mike Waltz to key White House posts.

After a sweeping victory over Vice President Kamala Harris on Nov. 5, President-elect Donald Trump is now set to become just ...