(CNN) -- Keep your eyes on southwestern Pennsylvania. While it's being overshadowed by higher-profile Senate primaries, a special election Tuesday for a House seat that represents that part of the state has drawn national attention and could have national implications.
And while the winners in the Senate primaries move onto the general election in November, the victor in this contest goes directly to Congress.
Republican Tim Burns is battling Democrat Mark Critz to fill the seat of the late Rep. Jack Murtha.
The race has stepped up in intensity over the past month, with both campaigns as well as national party committees going up with television ads.
http://www.cnn.com/2010/POLITICS/05/18/pennsylvania.house/PPP (D) 5/15 - 5/16 831 LV 48 47 Burns +1
http://www.publicpolicypolling.com/pdf/PPP_Release_PA_516.pdf