The two campaigns locked in Minnesota's intensifying marriage amendment fight are wrestling with a glaring dividing line more stubborn than Democrat and Republican: Young versus old.
From California to Maine, an overriding thread that stitched together residents across the country is that younger voters tend to oppose the amendments and older voters generally support them.
"There's no question that's an accurate reflection of how people look at the issue," said Frank Schubert, a California-based consultant who is leading Minnesota for Marriage's effort to pass the measure.
Both campaigns are frantically trying to calibrate their strategies to build winning coalitions from their natural bases of support, but also broaden to groups that historically have embraced the other side.
In a move that attracted a younger audience, Minnesota for Marriage created the "She Said Yes" proposal contest at local fairs and plans to bring its message to college campuses around the state. Amendment opponents got "A Prairie Home Companion" radio host Garrison Keillor to record voice-mail greetings for new donors, which appealed to older voters. They're also using younger Minnesotans to persuade older family members to reject the measure.
In what is shaping up as a breathtakingly close race, these efforts could make all the difference.
The marriage amendment is blossoming into the most expensive campaign of the election season. The state already has laws banning same-sex marriage. Amendment supporters, perhaps mindful of a generational shift, want to cement it into the state's Constitution to prevent judges or future legislators from changing the law. If it passes, only another amendment to repeal could take it out.
The generational divide flared vividly nearly two weeks ago, when Minnesota Vikings punter Chris Kluwe published a scorching letter on the website Deadspin, lambasting a Maryland state legislator who criticized a Baltimore Ravens player's vocal support of gay marriage.