Hakeem Jeffries leads the Speaker market at 78% because prediction markets and election forecasts assign Democrats an 82-87% chance of securing a House majority in the November 2026 midterms, positioning the current minority leader for election by the new Democratic caucus on the first day of the 120th Congress. Recent generic ballot polling showing a Democratic advantage of 8-12 points, combined with multiple forecasters projecting net Democratic gains sufficient to flip the chamber, has reinforced trader consensus on this outcome. Mike Johnson trails at 12.7% as the incumbent Republican Speaker, with lower odds reflecting both the party's projected loss of majority control and potential internal GOP leadership challenges in a narrow or retained majority. Secondary Democratic names such as Pete Aguilar and Katherine Clark register in the low single digits, consistent with Jeffries' established support within the caucus despite occasional primary pressures from progressive factions.