If money talks, then Sarah Palin has finally endorsed Mitt Romney. Newly released campaign-finance reports show that Ms. Palin’s political fund donated $5,000 to Mr. Romney’s presidential campaign Wednesday. Ms. Palin is normally known for her splashy endorsements, but the donation from SarahPAC was made without fanfare: It was buried amid hundreds of pages of donations disclosed on Form 6 of Mr. Romney’s “Filing FEC-831889” made public Friday. Ms. Palin, a former Alaska governor who was the GOP vice presidential nominee in 2008, declined to make an endorsement during the presidential primary, choosing instead to continue speculation that she might...