Jenner & Block Files Amicus Brief Highlighting Petitioner’s Flawed Invocation of Moore v. Harper

On behalf of the Brennan Center, Campaign Legal Center, the Protect Democracy Project, and the League of Women Voters, a Jenner & Block team filed an amicus brief in the case of Donald J. Trump v. Norma Anderson where Donald Trump asked the US Supreme Court to reverse a Colorado ruling barring him from the state’s primary ballot. The brief explains the “legal errors in Petitioner’s reading of Moore v. Harper and the threats that erroneous reading presents to free, fair, accessible, and workable elections.”

The brief, which was on behalf of neither party, argues that Petitioner’s invocation of Moore v. Harper as an invitation to second-guess the Colorado Supreme Court’s interpretation of Colorado law is flawed, and accepting his framing of the case would wreak the havoc the Court avoided last term when it rejected the so-called independent state legislature theory.

“Moore reaffirmed the longstanding, basic principle that state election laws are subject to judicial review by state courts,” the brief said. 

The team is being led by Partner Michelle Kallen with support from Associate Emmanuel Powell III and Law Clerk Donovan Hicks.

Partners Jessie Amunson and Sam Hirsch successfully represented the North Carolina League of Conservation Voters in the US Supreme Court in Moore v. Harper.

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© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.

Jenner & Block Files Amicus Brief Highlighting Petitioner’s Flawed Invocation of Moore v. Harper

On behalf of the Brennan Center, Campaign Legal Center, the Protect Democracy Project, and the League of Women Voters, a Jenner & Block team filed an amicus brief in the case of Donald J. Trump v. Norma Anderson where Donald Trump asked the US Supreme Court to reverse a Colorado ruling barring him from the state’s primary ballot. The brief explains the “legal errors in Petitioner’s reading of Moore v. Harper and the threats that erroneous reading presents to free, fair, accessible, and workable elections.”

The brief, which was on behalf of neither party, argues that Petitioner’s invocation of Moore v. Harper as an invitation to second-guess the Colorado Supreme Court’s interpretation of Colorado law is flawed, and accepting his framing of the case would wreak the havoc the Court avoided last term when it rejected the so-called independent state legislature theory.

“Moore reaffirmed the longstanding, basic principle that state election laws are subject to judicial review by state courts,” the brief said. 

The team is being led by Partner Michelle Kallen with support from Associate Emmanuel Powell III and Law Clerk Donovan Hicks.

Partners Jessie Amunson and Sam Hirsch successfully represented the North Carolina League of Conservation Voters in the US Supreme Court in Moore v. Harper.

Related Capabilities

Related Locations

© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.

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