President Trump's anticipated endorsement looms large over the 2026 GOP primaries, particularly the Texas Senate Republican runoff on May 26 between incumbent Sen. John Cornyn and challenger Attorney General Ken Paxton, following their narrow March 3 primary results. Trump signaled he would decide "soon" on March 4 but skipped a March 17 deadline, amid Paxton's late-March Mar-a-Lago meeting with him and ongoing MAGA pressure against Cornyn's establishment ties. Cornyn recently gained healthcare industry endorsements, while K Street handicappers view him as the frontrunner. Trump's past primary endorsements have proven decisive for turnout and base consolidation; his choice here could preview midterm Senate battleground dynamics, with other races like Maine Sen. Susan Collins' primary also in focus.
Experimental AI-generated summary referencing Polymarket data · Updated$110,998 Vol.

Susan Collins - ME-Sen
64%

Ken Paxton - TX-Sen
60%

Andy Barr - KY-Sen
52%

Steve Hilton - CA-Gov
50%

John Cornyn - TX-Sen
23%
$110,998 Vol.

Susan Collins - ME-Sen
64%

Ken Paxton - TX-Sen
60%

Andy Barr - KY-Sen
52%

Steve Hilton - CA-Gov
50%

John Cornyn - TX-Sen
23%
If Donald Trump does not announce an endorsement by the day before the scheduled election at 11:59 PM ET, this market will resolve to "No".
The resolution source for this market will be official information from Donald Trump or one of his representatives, or a consensus of credible reporting of Donald Trump's endorsement.
Market Opened: Sep 12, 2025, 4:29 PM ET
Resolver
0x65070BE91...If Donald Trump does not announce an endorsement by the day before the scheduled election at 11:59 PM ET, this market will resolve to "No".
The resolution source for this market will be official information from Donald Trump or one of his representatives, or a consensus of credible reporting of Donald Trump's endorsement.
Resolver
0x65070BE91...President Trump's anticipated endorsement looms large over the 2026 GOP primaries, particularly the Texas Senate Republican runoff on May 26 between incumbent Sen. John Cornyn and challenger Attorney General Ken Paxton, following their narrow March 3 primary results. Trump signaled he would decide "soon" on March 4 but skipped a March 17 deadline, amid Paxton's late-March Mar-a-Lago meeting with him and ongoing MAGA pressure against Cornyn's establishment ties. Cornyn recently gained healthcare industry endorsements, while K Street handicappers view him as the frontrunner. Trump's past primary endorsements have proven decisive for turnout and base consolidation; his choice here could preview midterm Senate battleground dynamics, with other races like Maine Sen. Susan Collins' primary also in focus.
Experimental AI-generated summary referencing Polymarket data · Updated



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