Assume you were a president, and a same-sex civil unions bill came to your desk. Would you sign it?

[eyesroll]

Poll question: Assume you were a president, and a same-sex civil unions bill came to your desk. Would you sign it?

This came up at dinner last night, and was an interesting debate.

Assume the bill unambiguously extended every right, obligation and protection of marriage to same-sex couples in civil unions, but did not use the word "marriage." Also assume it repealed DOMA and ordered states to create a civil union process parallel to that of marriage. (Assume for the same of argument that the bill would pass constitutional muster in its entirety, which I'm not sure it would but I don't want to get bogged down in that.)

Also assume it was not passed by veto-proof majorities -- if you didn't sign it, it would be dead.

Anyhow...would you vote for it?