Thune makes bold prediction about Republicans' Senate chances as GOP pulls millions from key races

FREMONT, Neb. — Senate Majority Leader John Thune, R-S.D., is predicting Republicans will outperform the polls and retain their narrow Senate majority, even as GOP-aligned groups pull millions of dollars from struggling candidates and redirect resources to races that have suddenly become more competitive.

Thune has been crisscrossing the country campaigning for vulnerable Republicans ahead of the Nov. 3 election. He’s confident that they can hold onto their slim, 53-to-47-seat majority in...