It's going to be a fun primary season, if Senate fundraising reports are any indication.

The money chase in several major races tightened in the fourth quarter, paving the way for competitive intra-party contests that will determine much of what happens in November.

In the Colorado GOP primary, former Lt. Gov. Jane Norton faces new competition from self-funder Tom Wiens. Norton raised a modest $550,000 and has $600,000 on hand, compared to $500,000 for Wiens, who had total receipts of $725,000.

The winner gets Sen. Michael Bennet (D-Colo.), who is still far outraising primary opponent Andrew Romanoff. He beat the former state House Speaker $1.2 million to $337,000 in the fourth quarter and leads $3.5 million to $480,000 in cash on hand.

Romanoff's viability is an open question, much like a few other underdogs.



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