Democratic Congresswoman and Republican challenger Lynn Jenkins are having another televised debate.
Tuesday's events will be broadcast from the studios of KSNT, the NBC affiliate in Topeka.
Boyda is seeking a second term, having unseated five-term Republican Congressman Jim Ryun in 2006.
Jenkins is a two-term state treasurer who defeated Ryun as he attempted a comeback in the August Republican primary.
In two previous televised debates, the two candidates sparred over such issues as taxes and the economy.
Jenkins has made her support for President Bush's tax policies the center of her campaign to unseat Boyda. The Democrat says she favors tax relief for the middle class but also shrinking the federal deficit.