reporter: iowa law does forbid those international poll monitors from being inside, and they will be arrested if that happens today in iowa. another thing to watch here is down ballot. there is a fight brewing about same-sex marriage. in 2009 the state supreme court legalized same-sex marriage, and that really motivated conservatives and evangelical christians here in iowa. they have successfully voted out three of the justices, today a fourth is on the ballot and also on the ballot, the state senate. it is narrowly controlled by democrats, conservatives are working hard to regain control of it so they can pass legislation regarding same-sex marriage. we talked to politics professor dennis goldfer from drake university about that. for the republicans, actually, i think the presence of this same-sex marriage issue in control of the iowa state senate and retention of an iowa supreme court justice, all those together provide coattails for mitt romney rather than the