With two polls out this week showing that Minnesotans favor a proposed constitutional amendment that would make marriage only between a man and a woman, opponents of the measure are in the midst of a strategy they think will sway voters. A key component will be conversations with voters designed to elicit compassion for gays and lesbians. That's important, the opponents say, because arguments against discrimination haven't worked in other states. Meanwhile, amendment supporters also are talking with voters, but not so much to change minds. Instead, they largely aim to determine how many people are on their side.