MIAMI — Francis Suarez, Miami’s second-term mayor, has filed papers to run in the Republican presidential primary, casting himself as a conservative problem solver as he faces an FBI probe over payments from a developer seeking help from the city. Suarez, 45, is expected to announce his candidacy Thursday at the Ronald Reagan Presidential Foundation, but papers filed with the Federal Election Commission on Wednesday show he’s officially a candidate for president. The married father of two first came to national prominence in 2020 when he was one of the first elected officials to contract COVID...