The Republican presidential hopefuls are making a final push for votes in Iowa ahead of tomorrow night's caucuses.

The last major poll shows Mitt Romney in the lead with Congreesman Ron Paul on his heels. Romney has gone on the offensive in the final days of the Iowa campaign, attacking GOP rivals and President Barack Obama.

Meanwhile, Newt Gingrich is also trying to recover from plunging poll numbers. He's fighting against a barrage of negative TV ads from a group supporting Romney.

Third in the polls is Rick Santorum, who has made a bit of a comeback after struggling for months to gain traction and get noticed.