Gavin Newsom leads the 2028 Democratic presidential nominee field at 20% on Polymarket, the prediction market platform. That puts the California governor ahead of any other potential candidate in the early betting odds for the next open Democratic primary.
Separately, a fresh forecast from Decision Desk HQ (DDHQ) predicts Democrats will win the House in the upcoming November elections. The same forecast shows the Senate ending in a 50-50 split after November.
What the Polymarket odds show
Polymarket’s 2028 Democratic nominee contract lists Newsom at 20% as of this week. No other candidate has broken into double digits on the platform. The odds reflect bettors’ expectations, not official polling or endorsements — but they offer a real-time snapshot of who the market thinks will emerge.
Newsom has not declared a run for president. He is term-limited as governor and cannot seek re-election in 2026, which leaves him free to pursue a national campaign. The 20% figure puts him ahead of a field that includes several sitting U.S. senators and other governors, though none have formally entered the race.
House forecast: Democrats ahead
DDHQ’s forecast gives Democrats a clear edge in the battle for the House. The model projects that the party will flip enough seats to take control of the chamber in November. Republicans currently hold a narrow majority, but the forecast suggests that advantage will not survive the election.
The forecast is based on district-level data, candidate quality, and historical trends. DDHQ did not specify a seat count, only that Democrats are favored to win the majority.
Senate forecast: a 50-50 split
On the Senate side, DDHQ predicts a 50-50 tie after November. That would mean no party holds a clear majority, leaving control dependent on the vice president’s tie-breaking vote. The current Senate is split 51-49 in favor of Democrats, but the forecast sees Republicans picking up at least one seat to even the count.
A 50-50 Senate would make every vote critical and give the White House outsized influence over the legislative agenda. The forecast does not specify which seats are likely to flip, only that the overall result will be a deadlock.
The November elections will test both predictions — the DDHQ House and Senate forecasts, and the Polymarket odds on Newsom. If Democrats retake the House and the Senate stays tied, the 2028 primary race will unfold against a very different political backdrop.
