John Thune of South Dakota has been elected as the new majority leader of the U.S. Senate following the Republicans’ recent electoral victory. This marks a significant shift for Thune, who has transitioned from being a critic to a supporter of President Donald Trump. Thune secured the role by defeating fellow Senators John Cornyn and Rick Scott, amidst internal party dynamics. Meanwhile, Stephen Miller has been appointed as Trump’s deputy chief of staff and homeland security advisor, playing a key role in Trump’s hardline immigration policies.