Democrat Ed Markey defeats Republican Gabriel E. Gomez in a Massachusetts special election to elect a senator to finish John Kerry's term. Kerry resigned in February to become Secretary of State.
Sources: New York Times
Sources: New York Times
Republicans in the United States Senate block a bill to form a commission to investigate the storming of the United States Capitol as the bill failed to pass by a vote of 54–35, making it the first filibuster used in the 117th United States Congress. However, House Speaker Nancy Pelosi says that the Democratic Party will still "proceed to find the truth".
Voters in Georgia head to the polls to cast their votes to determine who will control the United States Senate. Republican Senator David Perdue will face Democrat Jon Ossoff, and incumbent Republican Kelly Loeffler will face Democrat Raphael Warnock.
The U.S. Senate fails to invoke cloture on a 55–45 vote effectively tabling a police misconduct bill introduced by the Republicans, after the Democrats argued that it did not do enough to incentivize change.
A week after the election, which was initially too close to call, Democratic Party candidate Kyrsten Sinema is elected to the United States Senate, defeating GOP candidate Martha McSally. Sinema is the first woman elected to represent Arizona in the Senate and first Democrat to win a Senate election in the state since 1988.
The Republican-controlled United States House of Representatives votes in favor of the repeal of the 2010 Patient Protection and Affordable Care Act and passage of the House's 2017 American Health Care Act, by a narrow, 217–213 vote. Twenty Republicans and all Democrats opposed the bill, which now heads to the United States Senate for its legislative action.
The U.S. Senate confirms Donald Trump's appointment of his former opponents in the presidential primaries, neurosurgeon Ben Carson and Governor of Texas Rick Perry, as Secretaries of Housing and Urban Development and Energy respectively, with the support of all Republicans and some Democrats.
Republican U.S. Senator David Vitter and Democratic state Representative John Bel Edwards top two Republican candidates for spots in the November 21 runoff election. Edwards wins 40 percent and Vitter 23 percent of the primary vote, according to unofficial returns.
Democrat Mary Landrieu loses her bid for a fourth term representing Louisiana in the United States Senate to Republican Congressman Bill Cassidy in Saturday's runoff election, increasing the GOP majority in the U.S. Senate to 54 seats.