2026 Midterm Election Update – October 21st, 2026
Bottom Line: Since the advent of the current two-party system (41 midterm elections), we've averaged the President's party losing 3 U.S. Senate seats and 28 seats in the House of Representatives in midterm election cycles. If that were to happen this cycle, Republicans would narrowly retain control the Senate, however Democrats would gain control of the House of Representatives – which they last held in 2022.
Republicans currently maintain a 53-47 majority in the Senate, meaning Democrats would need to flip four net seats to gain control, as Vice President JD Vance, as President of the Senate, would split 50-50 ties.
In the House of Representatives, Republicans currently hold a 218-214 majority (with two vacancies), meaning Democrats only need to flip three net seats to gain control of the chamber.
There are only three times that the incumbent President's party has gained seats (1934 during FDR's first term, 1998 during Bill Clinton's second term, and 2002 during George W. Bush's first term) thus only 3 out of 41 midterm elections have resulted in the President's party netting additional congressional seats. Here's another way of looking at it... History suggests there's a 93% chance Democrats will gain Congressional seats this cycle.
Will history repeat itself this year? There’s been one polling indicator which has been 100% accurate in midterm election cycles. The generic ballot. Since the advent of the polling age in the 1930’s, the party favored on Election Day on the generic ballot has fared best in every cycle. In the most recent cycle, the 2022 Midterm elections, Republicans were favored by 2.5% in the RealClear Politics average of polls and ended up winning 2.8% more of the vote nationally. So how about this cycle?
As of today, the generic ballot says:
- DEM +8.3% (vs. 7.9% October 15th)
We're now under two weeks away from Election Day and Democrats are posting their largest generic ballot advantage of the cycle thus far. The continued momentum on the left comes on the back of the recent inflation reports showing consumer inflation rising by the highest monthly amount since May – with energy price spikes due to the Russia-Ukraine war, and the Iranian war largely to blame. What’s more is that with oil prices over $100 per barrel currently, prices at the pump and inflation related pressures generally are likely to continue to increase heading into Election Day.
Notably, over 10.8 million Americans have already voted in this year’s midterm elections based on data from the University of Florida’s Election Lab with Democrats significantly outvoting Republicans. Democrats have accounted for 48.3% of overall votes cast thus far, compared to 28.9% of the votes cast by Republicans.
With the majority of the votes thus far being cast by mail it’s not necessarily a surprise to see Democrats with a significant advantage, as Democrats have held a significant vote-by-mail advantage in recent cycles – while Republicans have significantly outvoted Democrats in-person. Nevertheless, the early margins by Democrats are significant, especially when weighed against a cycle that by every measure appears to favor them.
At the peak of the Iran war Democrats enjoyed a 7.7% generic ballot advantage – we're now beyond mark. The current advantage sits between 2018’s blue wave election cycle and 2006’s massive blue wave.
With the generic ballot splits as they exist today, Democrats would likely win the cycle solidly if the election were today – with a performance that would sit close to a wave election result nationally. Notably, in midterm election cycles since the onset of the polling age in the 1930's, whatever party has had an advantage on the generic ballot at the onset of September has fared best nationally on Election Day.
A wildcard adding to the uncertainty this cycle are numerous states redrawing maps in advance of the midterm elections – including Florida. Redrawn maps will all factor into outcomes in a potentially unprecedented way.
Retirements also have historically proved to be significant. Congressional incumbents running for reelection have won over 90% of the time. It’s common for members of Congress who feel especially vulnerable to retire as opposed to potentially losing an election. Often the party with the most retirements performs worse in midterms. On that note to date here are the announced retirements in the House of Representatives:
- Democrats: 22
- Republicans: 36
And in the United States Senate:
- Democrats: 4
- Republicans: 6
I’ll track these dynamics from time-to-time as we head into this year’s midterm election cycle.