According to the Denver Post this morning (minutes ago, actually), Eldorado county Democrat Mark Udall has filed the necessary paperwork this morning to run for state senate.
Udall made the announcement as he filed other paperwork showing how much money his congressional campaign fund has raised. That fund took in nearly $324,000 in the first quarter of the year and ended March with $1.5 million.
Udall started the period with $1.3 million already in hand.
Udall will need millions more for that Senate race. The seat is now open, with Sen. Wayne Allard announcing his retirement. In the 2004 open Senate race, winner Sen. Ken Salazar, a Democrat, spent $10 million and Republican Pete Coors spent $8 million.