Traders assign Democratic trifecta control the highest implied probability at 61 percent for the 2028 balance of power, reflecting the party's recent gains in Senate and House positioning after the 2026 midterms. Republican trifecta odds sit at 14.5 percent amid narrower paths to unified government. Split outcomes, such as a Democratic president paired with a Republican Senate and Democratic House at 8.5 percent, capture smaller shares as bettors factor in historical midterm swing patterns, Electoral College math, and battleground state dynamics. Upcoming 2027 primaries, candidate announcements, and any major legislative votes could alter these probabilities before the general election cycle intensifies.