Verified reports confirm that Sen. John Cornyn (R-Texas) shared the fable of the frog and the scorpion on social media [The Hill] [Washington Examiner] [The Daily Caller]. President Donald Trump endorsed Texas Attorney General Ken Paxton before the Texas Senate GOP primary runoff [The Hill] [Washington Examiner]. Ken Paxton won the Texas Senate GOP primary runoff election [The Hill] [Washington Examiner] [The Daily Caller]. The runoff election occurred on a Tuesday [The Hill] [Washington Examiner] [The Daily Caller]. Cornyn had touted a record of voting with Trump 99.3 percent of the time [The Hill]. Supported claims indicate Cornyn lost the Texas Senate GOP primary runoff by 28 percentage points [Washington Examiner] [The Daily Caller]. Cornyn held his Senate seat for over two decades [Washington Examiner]. Trump endorsed Paxton in the final hour before the runoff election [Washington Examiner]. Trump stated he supported Paxton because Cornyn did not support him when times were tough [Washington Examiner]. Cornyn argued that Trump should not run again following the 2020 election [Washington Examiner]. Unverified reports include Cornyn posting the Winston Churchill quote "Now this is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning" on X [The Daily Caller] and Cornyn posting the scorpion and frog fable on X on May 29, 2026 [The Daily Caller]. Consensus facts across sources establish the sequence of the endorsement, the fable post, the Tuesday runoff date, and Paxton's victory. Disputed or lower-quality claims center on the precise 28-point margin and the timing of the endorsement relative to voter motivations. Blindspots include whether low-turnout dynamics, Paxton's legal record, or specific policy differences on immigration enforcement contributed independently of the late endorsement. [Washington Examiner] and [The Daily Caller] reported the margin and endorsement timing details. [The Hill] focused on Cornyn's voting alignment record. The three sources share center-to-right bias distribution with one center outlet.