Colorado Democrat Andrew Romanoff raised $600,000 in the first quarter of 2014 and ended March with nearly $2.1 million, his campaign announced Wednesday.  

In a top pickup opportunity for Democrats, Romanoff, a former state speaker and Senate candidate, is challenging Republican Rep. Mike Coffman.  

The third-term incumbent’s fundraising numbers from January through March were not immediately available. Both candidates started the year in similar financial position, with Romanoff ahead in cash on hand, with $1.7 million to Coffman’s $1.5 million.  

Between these fundraising numbers and Denver’s relatively pricey media market, the race for Colorado’s 6th District is shaping up to be one of the most expensive House races in the country.  

The race is rated Tossup by Rothenberg Political Report/Roll Call.