Despite the presidential candidates' support for the New Hampshire repeal, younger Republicans in this state are skeptical, especially as voters are focused on the economy.

"Why is the NH House wasting time trying to repeal gay marriage? Capital ugh," Robert J. Johnson, chairman of the New Hampshire College Republicans, wrote on Twitter.

Polling suggests it may not be a winning issue.

A recent University of New Hampshire poll found that 62 percent of state residents oppose repealing the same-sex marriage law. And nationally, public opinion has gradually shifted toward supporting same-sex marriages, even among Republicans.