Former Colorado House Speaker Andrew Romanoff (D) is now in a dead heat with Sen. Michael Bennet (D) in the state's Democratic primary, according to new numbers from Survey USA.

The latest polling shows the race has tightened considerably in the past few weeks. A Denver Post poll released Sunday (conducted by Survey USA) has Romanoff leading 48 percent to 45 — within the margin of error.

Just two months ago, Romanoff was ahead of Bennet by more than 15 points. The senator has countered with his own internal numbers, but in a danger sign for Bennet they only have him ahead by four points.

Romanoff, who sold his house last week to aid his campaign, still faces an opponent who was sitting on more than $2.5 million as of his last Federal Election Commission filing. Bennet is poised to spend that money aggressively during the final stretch before the Aug. 10 primary.

Romanoff is trying to continue the trend of knocking off incumbent senators in primaries this cycle. Sens. Arlen Specter (D-Pa.) and Bob Bennett (R-Utah) have already lost, while Sen. Blanche Lincoln (D-Ark.) narrowly survived her primary challenge.