Sen. Thune to seek reelection as Republican Conference chairman

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Cornyn had previously served as chairman of the National Republican Senatorial Committee (NRSC). Thune had reportedly been considering a challenge to Cornyn for the whip spot.

Prior to serving as Conference chairman, Thune served as vice chairman of the Conference and also was chairman of the Senate Republican Policy Committee. 

Meanwhile, the race to become the next chairman of the NRSC has begun to heat up. Sen. Jerry Moran (R-Kan.) is running for the job and Sen. Rob Portman (R-Ohio) is also considering a bid.