Sen. Mike JohannsMike JohannsLobbying World To buy a Swiss company, ChemChina must pass through Washington Republican senator vows to block nominees over ObamaCare co-ops MORE (R-Neb.) will not seek reelection in 2014, retiring after just one term in office and opening a seat that is likely to remain in Republican hands.

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"We would like to share with you a decision we have made about running for re-election to the United States Senate. We have decided not to seek re-election," reads an email sent by Johanns and his wife, Stephanie.

"With everything in life, there is a time and a season. 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," the email adds.

Johanns previously served as governor of Nebraska and Agriculture secretary. His wife is a former state senator.

Sen. Jerry MoranJerry MoranAt the table: The importance of advocating for ABLE GOP lawmakers lead way in holding town halls Yahoo reveals new details about security MORE (R-Kan.), chairman of the National Republican Senatorial Committee (NRSC), praised Johanns in a statement.

"Mike Johanns epitomized principled leadership during his near three decades of public service, always putting the needs of Nebraskans first. I thank him for his service and wish he and his family the very best in their next chapter,” said Moran. “The Cornhusker state will look to continue its strong conservative tradition by electing an equally dedicated Republican leader in 2014."

Nebraska Gov. Dave Heineman (R) is likely to pursue the seat in 2014.

This post was last updated at 12:22 p.m.