Ohio Senator Rob Portman’s recent announcement that he has decided to favor same-sex marriage has had some political fallout, according to a poll from Quinnipiac University:

Portman's job approval rating among voters slips to 40 - 31 percent, fueled mainly by a dip in Republican support, since he came out in favor of gay marriage, according to a Quinnipiac University poll....

This compares to Sen. Portman's 44 - 24 percent approval rating in a February 28 survey by the independent Quinnipiac University. Republican approval drops from 63 - 8 percent to 57 - 21 percent, 41 percent of Republicans saying they think less favorably of Portman because of his support of same-sex marriage.

We’re still told time and again that Republican politicians should “evolve” on this issue to court voters. But the numbers continue to suggest otherwise.