Former Secretary of State Hillary Clinton/New Mexico Sen. Martin Heinrich-317 EV
Indiana Governor Mike Pence/South Dakota Senator John Thune-221 EV
If Pence runs for president, and wins the nomination, the question over the Religious Freedom bill he signed into law will be on the headlines for a while, but this would be the map if that was the issue for the Pence/Clinton election. If Pence can discuss economic issues or have a good message, he can beat Clinton.
There's more support for the religious freedom exceptions than there is for gay marriage, so that's probably not going to be the issue that dooms Pence.
http://www.latimes.com/nation/la-na-gay-marriage-poll-20150205-story.html