Former Arkansas Gov. Mike Huckabee’s opponents in the race for the White House who are senators should either resign or drop out of the contest, he said on ABC’s Good Morning America Wednesday. “If a person has a job that the taxpayers are paying for, shouldn’t that person do that job?” Huckabee, a Republican who said Tuesday he was running for president, told ABC News’ George Stephanopoulos on GMA. Three of his opponents in the Republican presidential field are U.S. senators: Sens. Rand Paul, Ted Cruz and Marco Rubio. Asked whether he thought his opponents should resign, he called it...