The National Republican Congressional Committee added six challengers to its “Young Guns” program on Tuesday.

Two of the six are in open-seat races. Kansas state Rep. Kevin Yoder won a Republican primary in the Kansas City-based 3rd district last week. He’ll take on Stephene Moore, the wife of retiring Rep. Dennis Moore (D). Madison County Commissioner Mo Brooks, who defeated Democrat-turned-Republican Rep. Parker Griffith in the primary, will get the NRCC’s support in northern Alabama. Brooks is heavily favored to win in the fall.

Two more are taking on first-term Members. In southern Michigan, former Rep. Tim Walberg (R) won a close primary last week to earn a rematch against freshman Rep. Mark Schauer (D). In New Jersey, former San Diego Charger Jon Runyan (R) will face Rep. John Adler (D), who represents a strip of central New Jersey.

Businessman Quico Canseco was also added to the Young Guns list. He is facing off against second-term Texas Rep. Ciro Rodriguez (D). Rodriguez served four terms before losing in 2004, and he returned to the House in 2007. The NRCC also added physician Nan Hayworth, who will take on another member of the class of 2006, Rep. John Hall (D), in New York.

Still missing from the list is former state Rep. Vicky Hartzler, who won a close primary last week to take on 17-term Rep. Ike Skelton (D) in southern Missouri.