WASHINGTON — President Trump on Friday said he told his administration to file its lawsuit to block certification of the U.S. Senate race in Alaska if Republican Sen. Dan Sullivan loses, kicking off what many fear could become a lengthy battle between the government and states over certifying an election where the president’s party is struggling. “I’m the one that said do it,” Trump told reporters as he landed for a campaign rally in Florida. The lawsuit, filed late Thursday by the Department of Justice, centers on one of the president’s long-standing complaints in the Senate race — the presence...