Michael Alfonso leads the WI-07 Republican primary market at 75% implied probability ahead of the August 11 contest for the open seat vacated by Rep. Tom Tiffany. Trump’s January 2026 endorsement, combined with Alfonso’s ties to former district Rep. Sean Duffy and substantial early fundraising supported by affiliated PAC spending, has consolidated much of the party establishment and voter attention behind the 26-year-old media producer. The remaining field—Niina Baum, Kevin Hermening, Jessi Ebben, and Don Raihala—trails in the mid-teens or lower, reflecting limited name recognition and resources in a crowded primary. Recent polling and debate participation have not produced measurable shifts, leaving Alfonso’s advantages from high-profile backing and organizational support as the dominant factors in current trader consensus.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedWI-07 Republican Primary Winner
Michael Alfonso 78%
Don Raihala 16%
Kevin Hermening 16%
Jessi Ebben 13%
Michael Alfonso
76%
Don Raihala
16%
Kevin Hermening
16%
Jessi Ebben
13%
Niina Baum
13%
Michael Alfonso 78%
Don Raihala 16%
Kevin Hermening 16%
Jessi Ebben 13%
Michael Alfonso
76%
Don Raihala
16%
Kevin Hermening
16%
Jessi Ebben
13%
Niina Baum
13%
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: Jul 20, 2026, 6:01 PM ET
Resolver
0x69c47De9D...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
0x69c47De9D...Michael Alfonso leads the WI-07 Republican primary market at 75% implied probability ahead of the August 11 contest for the open seat vacated by Rep. Tom Tiffany. Trump’s January 2026 endorsement, combined with Alfonso’s ties to former district Rep. Sean Duffy and substantial early fundraising supported by affiliated PAC spending, has consolidated much of the party establishment and voter attention behind the 26-year-old media producer. The remaining field—Niina Baum, Kevin Hermening, Jessi Ebben, and Don Raihala—trails in the mid-teens or lower, reflecting limited name recognition and resources in a crowded primary. Recent polling and debate participation have not produced measurable shifts, leaving Alfonso’s advantages from high-profile backing and organizational support as the dominant factors in current trader consensus.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

Beware of external links.
Beware of external links.
Frequently Asked Questions