As the House's budget bill moves to the Senate, here are some key Republican senators worth keeping an eye on.

Senate Majority Leader John Thune, R-S.D., speaks to reporters at the Capitol on May 13. (Kevin Dietsch/Getty Images) ...

it is appropriate for the Senate to speak as a body to the question,” Senator John Thune, the South Dakota Republican and majority leader, said as the chamber voted repeatedly to override ...