U.S. Senate Republican leader John Thune faces the test of his career this year as he tries to steer Donald Trump's agenda through a narrowly divided Congress while protecting his own chamber's authority over Cabinet picks and spending.

The Senate gaveled in on Friday and officially came under Republican control, with newly elected Majority Leader John Thune (R-SD) being sworn in and vowing to preserve the filibuster, among other

New Senate Majority Leader John Thune is kicking off the new session with a promise to preserve the filibuster, saying in his first floor speech as leader that his priority will be to “ensure the Senate stays the Senate.

Sen. John Thune (R-S.D.) in his first prepared address as Senate majority leader says “preserving” the filibuster will be one of his top priorities, making an early move to quash any talk of major

Sen. John Thune used his first few minutes of floor time to make a commitment to defend the filibuster rule, which requires at least 60 votes to pass Senate legislation.

John Thune has ascended to the top position in the Senate, replacing Mitch McConnell, who held the position for 18 years. In the position, Thune will be tasked with managing Donald Trump's demands, keeping 53 Republican senators in line,