Changes

*'''Oregon'''

*'''Oregon'''

Democrat [[Ron Wyden]] is heavily favored to win reelection.

A Rasmussen Reports poll showed Democratic Senator [[Ron Wyden]] is leading an unheard of Republican challenger, Lewis & Clark College law professor Jim Huffman by a modest 49%-35% margin. <ref>http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/oregon/toplines/toplines_oregon_senate_february_16_2010/</ref>

*'''Pennsylvania'''

*'''Pennsylvania'''

*'''Washington'''

*'''Washington'''

Senior Senator [[Patty Murray]] is well positioned for reelection in 2010. Although if 8th district Congressman [[Dave Reichert]] runs the race could become competitive.  

Polls show that Senior Senator [[Patty Murray]], once considered well positioned for reelection in 2010, could face a competitive race. <ref>http://hotlineoncall.nationaljournal.com/archives/2010/01/murrays_seat_in.php</ref><ref>http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/washington/toplines/toplines_2010_washington_senate_february_11_2010</ref> State Senator [[Don Benton]] has announced his candidacy for the Republican nomination.  

*'''Wisconsin'''

*'''Wisconsin'''