Condition: Republicans control the U.S. Senate when the 120th Congress convenes on January 3, 2027: Republican senators hold at least 50 seats (with the Republican Vice President breaking ties). Otherwise this market resolves N/A.

Resolves YES if the U.S. Senate votes to confirm a nominee to the Supreme Court of the United States between January 3, 2027 and January 3, 2029 (inclusive), for any seat including Chief Justice. Resolves NO otherwise.

This is one half of a conditional pair; its twin asks the same question if Democrats win the Senate. Comparing the two shows what the market thinks control of the Senate changes.

Starting probability is a seed, not a forecast: anchored on public prediction-market prices where a related market exists, otherwise a prior.