There’s more than enough time for some GOP lawmakers to support their presidential candidate, whoever it may be. While Trump won Iowa by a 30-point margin over Florida Ron DeSantis and former UN Ambassador Nikki Haley, some in D.C. believe the contest isn’t over and therefore aren’t endorsing Trump yet, according to CNN. “I’ve always been worried” about Trump’s chances when it comes to the general election,” Sen. John Thune (R-SD), who is the No. 2 Senate Republican, told the outlet. He said that the general elections are won “in the middle of the electorate.” ALSO READ: Trump suggests he will…