Sen. Mike Johanns (R-Neb.) announced Monday that he will not seek reelection in 2014, ending his Senate career after just one term.

The former governor's exit was not expected. He will leave an open seat that Republicans will be expected to win in a very red state.

"With everything in life, there is a time and a season," Johanns and his wife, Stephanie, wrote in an e-mail to supporters. "At the end of this term, we will have been in public service over 32 years.  Between the two of us, we have been on the ballot for primary and general elections 16 times and we have served in eight offices.  It is time to close this chapter of our lives."