Traders heavily favor state Rep. Mayes Middleton at 72.5% implied probability to win the Texas Attorney General Republican primary runoff, with U.S. Rep. Chip Roy trailing at 36%, reflecting Middleton's stronger grassroots support among conservative primary voters and recent endorsements from key Texas GOP figures. No major developments like new polls, debates, or campaign finance disclosures have emerged in the past 30 days to shift sentiment, leaving odds anchored to pre-runoff polling averages showing Middleton's lead in battleground districts and higher fundraising totals. The runoff format, triggered by no candidate clearing 50% in the initial primary, heightens turnout dynamics among the GOP base, with upcoming early voting as the next potential catalyst.