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Unified government at a crossroads

Midterm elections often see lower turnout but can still drive major political change. The 2026 midterm comes at a tense moment, with polarization, narrow majorities, and economic and geopolitical uncertainty shaping the stakes. Fiscal and trade policies are shifting, with potential volatility from debt ceiling debates and the prospect of a divided government. Despite this uncertainty, market performance will continue to depend mainly on fundamentals like earnings, monetary policy, and growth.

Scenario analysis

As of 14 May 2026

Status quo

Republicans retain narrow control of both chambers of Congress

UBS status quo probability

UBS probability: 15%

Predictit status quo forecast

PredictIt forecast: 28%

Polymarket status quo forecast

Polymarket forecast: 22%

Divided Congress

Republicans retain control of the Senate but lose the House

UBS divided congress probability

UBS probability: 50%

Predictit divided congress forecast

PredictIt forecast: 33%

Polymarket divided congress forecast

Polymarket forecast: 34%

Democratic sweep

Democrats assume control of both the Senate and the House

UBS democratic sweep probability

UBS probability: 35%

Predictit democratic sweep forecast

PredictIt forecast: 39%

Polymarket democratic sweep forecast

Polymarket forecast: 44%

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