Senator Rick Scott of Florida is considering a late entry into the Republican presidential primary race, a move that would make him the latest high-profile Florida Republican to try to wrest the nomination from Donald J. Trump, according to two people familiar with the discussions. Should he enter the race, Mr. Scott, Florida’s former governor, would be challenging both the front-runner, Mr. Trump, as well as the distant-second rival, Ron DeSantis, the state’s current governor. Mr. Scott would also join Mr. Trump, Mr. DeSantis and Mayor Francis X. Suarez of Miami as the fourth Republican presidential candidate from Florida. Mr....