As long as Nikki Haley has been a national figure, she has held a distinct, defined role in politics. She rose to stardom as a two-term governor of South Carolina and then served as President Donald Trump’s first U.S. ambassador to the United Nations. Along the way, she was repeatedly mentioned as a possible presidential or vice presidential figure (to the point that speculation was rampant that she would replace Mike Pence on Trump’s reelection ticket). Haley was one of the few high-profile members of the administration to leave on good terms with Trump, and she did so without becoming a liability on the trail for down-ballot candidates, especially other women. So, with no clearly defined role in the Republican Party or conservative movement and Democrats in power, what is Haley doing now? The answer seems to be: one thing at a time. “Since I left the ambassadorship, I wrote a book [With All Due Respect: Defending America With Grit and Grace], I started a PAC [called] Stand for America, which now has millions of supporters, which I’m super proud of,” Haley told the Washington Examiner in a recent interview. “We were very involved in the elections leading up to November. They didn’t all go the way we wanted, of course, so we are focusing on doubling down on those efforts. We want to win back the House. We want to win the Senate. We...