A new NBC/Marist poll shows Texas Congressman Ron Paul in a statistical tie with Mitt Romney, leading in Iowa just four days before the caucuses.

Romney is just a smidge above Paul, 23 to 21 percent, falling within the margin of error. Rick Santorum, with 15 percent, is still in third. This seems to confirm a poll from CNN earlier this week, which showed him surging. Governor Perry, who is wrapping up a statewide, 44 city bus tour Monday, is close behind Santorum with 14 percent.

Former front-runner Newt Gingrich is back in 5th place according to this survey. Wednesday’s CNN poll had Gingrich in fourth above Perry.