Trump’s endorsement of Catalina Lauf on August 13 has sharply shifted trader consensus in the crowded August 18 Republican primary for Florida’s open 19th congressional seat, previously held by Byron Donalds. The former Trump administration official now leads at 81.5% implied probability, ahead of local businessman Jim Schwartzel at 11.8%. Earlier polling showed the pair competitive in the high teens with many undecided voters. Other candidates including Jim Oberweis, Madison Cawthorn, and lower-polling entrants trail significantly. The endorsement, combined with additional backing from Florida Republican lawmakers, has consolidated support for Lauf in the heavily Republican district, while Schwartzel retains some local business and organizational ties. The primary outcome will determine the nominee in a district Trump carried by wide margins.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedCatalina Lauf 82%
Jim Schwartzel 10.8%
Jim Oberweis 3.9%
Madison Cawthorn <1%
$73,429 Vol.
$73,429 Vol.

Catalina Lauf
82%

Jim Schwartzel
11%

Jim Oberweis
4%

Madison Cawthorn
1%

Bob Rommel
<1%

Spencer Roach
<1%
Catalina Lauf 82%
Jim Schwartzel 10.8%
Jim Oberweis 3.9%
Madison Cawthorn <1%
$73,429 Vol.
$73,429 Vol.

Catalina Lauf
82%

Jim Schwartzel
11%

Jim Oberweis
4%

Madison Cawthorn
1%

Bob Rommel
<1%

Spencer Roach
<1%
If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".
The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/.
Any replacement of the nominee before election day will not change the resolution of the market.
Market Opened: Nov 25, 2025, 6:46 PM ET
Resolver
0x2F5e3684c...If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".
The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/.
Any replacement of the nominee before election day will not change the resolution of the market.
Resolver
0x2F5e3684c...Trump’s endorsement of Catalina Lauf on August 13 has sharply shifted trader consensus in the crowded August 18 Republican primary for Florida’s open 19th congressional seat, previously held by Byron Donalds. The former Trump administration official now leads at 81.5% implied probability, ahead of local businessman Jim Schwartzel at 11.8%. Earlier polling showed the pair competitive in the high teens with many undecided voters. Other candidates including Jim Oberweis, Madison Cawthorn, and lower-polling entrants trail significantly. The endorsement, combined with additional backing from Florida Republican lawmakers, has consolidated support for Lauf in the heavily Republican district, while Schwartzel retains some local business and organizational ties. The primary outcome will determine the nominee in a district Trump carried by wide margins.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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