January 11–12, 2017: Senate, in an all-night session, took first steps to repeal the Affordable Care Act, (ACA). The final vote was 51 to 48 to approve a budget resolution to allow "broad swaths of the Affordable Care Act to be repealed through a process known as budget reconciliation."
February 7, 2017: the Vice President cast the tie-breaking vote to confirm Betsy DeVos as Secretary of Education. This was the first time in United States history that a cabinet confirmation was tied in the Senate and required a tie-breaking vote.
Allegations that Congressman Ruben Kihuen sexually harassed a campaign staffer led some in congressional leadership to call for his resignation. Kihuen later announced he would not seek another term in office.
Senator Al Franken announced he would resign "in the coming weeks" after photographs were made public suggesting that he sexually assaulted Leeann Tweeden, a Los Angeles-based radio personality, during a USO tour in Iraq in 2006. He was also accused by multiple female constituents of groping at various Minnesota fair appearances that he attended.
Allegations that Representative Blake Farenthold sexually harassed a former staffer resulted in the commencement of an investigation by the House Ethics Committee and his announcement he would not seek re-election in 2018. He ultimately resigned on April 6, 2018.