Campaign official Mike Stratton says Salazar plans to run ``a
good and positive campaign,'' and welcomes the challenge from
The seat could be one of the most competitive races in the
nation and decide the balance of power in the Senate.
Republicans hold a 51-to-48 majority there.
Salazar's decision comes a week after GOP Senator Ben
Nighthorse Campbell abruptly announced he would not seek a third
term this fall.