The First Measured Century: Book: Section 10.2
The Republican Senate edge – Sabato's Crystal Ball
How do major political parties split control of Congress? - U.S. Embassy & Consulates in Italy
Chart: Republicans Projected To Take House, Senate Still a Toss-up | Statista
Top 10 US Senate races to watch during Nov. 8 midterm elections
Balance of Power in the Senate | Bloomberg Government
House control still undecided, Democrats celebrate Senate win
Why the Democrats are our narrow favourites to win the Senate
The Senate seats most likely to flip parties in November - The Washington Post
United States Senate elections, 2016 - Ballotpedia
Republican Fears About Holding The Senate Start To Sink In : NPR
How the 2 U.S. Senate races in Georgia will shape Biden's presidency | CBC News
US election 2020: The five Senate races to watch - BBC News
House seats rarely flip from one party to the other | Pew Research Center
Balance of Power in the Senate | Bloomberg Government
U.S. Senate composition by political party affiliation 2023 | Statista
Georgia: Democrats win control of US Senate – DW – 01/06/2021
The 2022 Midterm Elections: What the Historical Data Suggest. | The American Presidency Project
The Republican Senate edge – Sabato's Crystal Ball
Here's why the 2018 Senate election will be crucial for President Trump and his Democratic foes - Los Angeles Times
With Control of the Senate in Play, These Are the Races to Watch - The New York Times
U.S. Senate has fewest split delegations since direct elections began | Pew Research Center
Charted: The partisan battle for state Senates
U.S. Senate: Combined Desks Seating Chart
