Tom Sell's commanding lead in the March 3 Republican primary for Texas' 19th Congressional District, topping a seven-candidate field amid incumbent Jodey Arrington's retirement, drives his 89% implied probability as traders bet heavily on his May 26 runoff victory over Abraham Enriquez, who finished second. Recent endorsements from eliminated primary rivals and State Rep. Carl Tepper, plus Sell's prior fundraising edge emphasizing West Texas agriculture and local priorities, have solidified trader consensus on his frontrunner status in this safe Republican seat. Enriquez, a national conservative and Trump ally, holds 8% amid limited momentum, though late scandals, voter turnout shifts, or campaign spending surges could narrow the gap before early voting starts mid-May. Other candidates' negligible odds reflect their primary defeats.