Trader consensus on Polymarket positions self-funded businessman Perry Johnson as the frontrunner at 48.5% implied probability to win Michigan's Republican gubernatorial primary on August 4, driven by his heavy ad spending that has eroded U.S. Rep. John James' polling lead. A Detroit News poll released April 28 showed James ahead among likely GOP primary voters despite Johnson's surge, following an Emerson survey (April 11-13) with them virtually tied at 21% and 20%, and a Glengariff/Detroit Regional Chamber poll (April 17-19) giving James 37% to Johnson's 20%. In this crowded field, Johnson's financial edge bolsters his path to consolidate support among undecided voters, while James relies on name recognition from prior statewide runs, with trailing candidates like Mike Cox and Joyce Gipson fragmented below 8%.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedPerry Johnson 49%
John James 36%
Evan Space 7.1%
Mike Cox 5.2%
$30,960 Vol.
$30,960 Vol.
Perry Johnson
49%
John James
36%
Evan Space
7%
Mike Cox
5%
Anthony Hudson
4%
William Null
3%
Joyce Gipson
7%
Karla Wagner
2%
Tom Leonard
1%
Aric Nesbitt
<1%
Ralph Rebandt
<1%
Perry Johnson 49%
John James 36%
Evan Space 7.1%
Mike Cox 5.2%
$30,960 Vol.
$30,960 Vol.
Perry Johnson
49%
John James
36%
Evan Space
7%
Mike Cox
5%
Anthony Hudson
4%
William Null
3%
Joyce Gipson
7%
Karla Wagner
2%
Tom Leonard
1%
Aric Nesbitt
<1%
Ralph Rebandt
<1%
If no 2026 Michigan Gubernatorial Republican Primary takes place, this market will resolve to “Other.”
The resolution source for this market will be the first official announcement of the results from the Michigan Republican Party; however, an overwhelming consensus of credible reporting may suffice.
Market Opened: Dec 10, 2025, 4:20 PM ET
Resolver
0x2F5e3684c...If no 2026 Michigan Gubernatorial Republican Primary takes place, this market will resolve to “Other.”
The resolution source for this market will be the first official announcement of the results from the Michigan Republican Party; however, an overwhelming consensus of credible reporting may suffice.
Resolver
0x2F5e3684c...Trader consensus on Polymarket positions self-funded businessman Perry Johnson as the frontrunner at 48.5% implied probability to win Michigan's Republican gubernatorial primary on August 4, driven by his heavy ad spending that has eroded U.S. Rep. John James' polling lead. A Detroit News poll released April 28 showed James ahead among likely GOP primary voters despite Johnson's surge, following an Emerson survey (April 11-13) with them virtually tied at 21% and 20%, and a Glengariff/Detroit Regional Chamber poll (April 17-19) giving James 37% to Johnson's 20%. In this crowded field, Johnson's financial edge bolsters his path to consolidate support among undecided voters, while James relies on name recognition from prior statewide runs, with trailing candidates like Mike Cox and Joyce Gipson fragmented below 8%.
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