You mean the two who are at 0% in the polls, who really cares?
It's a tacit endorsement for Trump, evangelicals will read between the lines and support Trump.
They each have won Iowa in the past. Those people remember that.
“You mean the two who are at 0% in the polls, who really cares?”
They could bring Trump some more of the evangelical vote.
Santorum won Iowa in 2012 and Huckabee won it in 2008.