MIDDLEBURY, Ind. (WOWO): Middlebury Senator Carlin Yoder won't run for a third term.

Yoder says the long drive from northern Indiana has taken away too much time from his family. He says he's got two kids playing basketball, and he and his wife are in the midst of adopting their fifth child. Yoder says he wasn't sure he could commit to another four years away from home.

Yoder sponsored Indiana's right-to-work law and this year's repeal of the common construction wage, and has been a leading advocate of private-school vouchers. As chairman of the Homeland Security and Transportation Committee, he's likely to preside over hearings this session on a road funding plan.

Yoder is district director for Third District Congressman Marlin Stutzman, who's leaving that seat to run for the U-S Senate. There's been speculation Yoder might run for that seat or the Second District seat of Republican Jackie Walorski. Yoder doesn't quite rule out a congressional bid in 2016, but says circumstances would have to change for him to consider it.

Yoder is the fourth senator to announce he won't run for reelection next year, joining fellow Republicans Scott Schneider of Indianapolis, Brent Waltz of Greenwood, and Brent Steele of Bedford.