Minnesota GOP Representative Tom Emmer endorses Donald Trump for president

(Undated)  --  Minnesota Republican Congressman Tom Emmer is endorsing Donald Trump's bid for the White House.  

The endorsement from the House Majority Whip comes after Trump and his allies denounced Emmer's brief bid for House Speaker.  

Emmer's support means the former president has the full backing of GOP leadership in the House before the January 15 Iowa caucuses.  

Trump is leading all other Republican presidential candidates in the polls.