Election may hinge on same-sex marriage issue

Voters in 11 states will decide Tuesday whether to write into their state constitutions a definition of marriage that limits the institution to unions of one man and one woman.
And thus may the presidential election be decided.

Four of the states with marriage amendments on the ballot are presidential battleground states, led by potentially decisive Ohio. The issue also could tip results in Michigan, Arkansas and Oregon by energizing Republican-leaning Christian evangelicals and other social conservatives.