The man suspected of sending at least a dozen parcel bombs to high-profile critics of U.S. President Donald Trump is a 56-year-old registered Republican in Florida with a lengthy criminal history, according to public records. Public records showed Cesar Sayoc has been arrested numerous times over the years for domestic violence, theft and other charges. In one case, court records showed he was accused of threatening to use a bomb, though details were not immediately available. Court records in Florida listed Sayoc’s birthplace as Brooklyn, New York. He filed for bankruptcy in Miami in 2012, according to court records. At...