From Jeremy W. Peters and Ashley Parker writing at the New York Times:
In the nearly three months since he announced that he was running for president, Senator Marco Rubio has been enjoying his moment. Republicans have talked up his potential. Democrats have called him a threat. He has been in the top tier of many polls.
But one of the biggest measures of his success — whether he impresses Republican donors as much as he does the party’s leading operatives and opinion shapers — has been harder to discern.
Mr. Rubio has a notable disadvantage in the congested, fragmented field of Republican candidates: He has no natural national base of support to draw on, the way Senator Ted Cruz does with evangelical Christians or Senator Rand Paul does with libertarians.
Read the rest of the story at the New York Times.