Sen. Marco Rubio (R-FL) endorsed Rep. Tom Cotton (R-AR) for Senate on Tuesday. The endorsement, announced through Rubio's Reclaim America Political Action Committee, is the first one the junior senator from Florida has made this cycle. In the endorsement, Rubio cited Cotton's time serving in the Army's 101st Airborne before saying that the Arkansas congressman would fight hard to repeal Obamacare if elected to the Senate.