Senate GOP leader John Thune (R-S.D.) is primed to hand President Trump a quick string of wins on his first days in office. Why it matters: Thune and Trump have a complicated history, but the new majority leader is doing his best to start Congress off on the right foot.

Kimberley Thune, Senate Majority Leader John Thune (R-S.D.), Jennifer Scalise and House Majority Leader Steve Scalise (R-La.). Photo: Jack Gruber - Pool/

Senate Majority Leader John Thune (R-SD) previewed what the first 100 days of the second Trump administration will focus on, specifically how Congress will work with President-elect Donald Trump to put the United States “back on track.

The senators said they would cooperate with the GOP to address "pressing border security and immigration needs”

Border state Sen. Mark Kelly (D-AZ) and a dozen other primarily Democratic senators are pushing the Republican-controlled Senate to include them in their work addressing the border and immigration matters.