Robert J. Muise (born 1965) is an American attorney specializing in constitutional law, religious freedom litigation, free speech, and defense of Judeo-Christian heritage. He is best known as the co-founder, chief trial counsel, and senior counsel of the American Freedom Law Center (AFLC), a conservative legal organization he established in 2011 alongside attorney David Yerushalmi. The AFLC focuses on defending American freedoms through high-profile cases involving religious liberty, free speech, national security, opposition to perceived threats from Islamism and progressive policies, and challenges to Islamic practices in the U.S., including efforts against Sharia law and Islamist influences. This work encompasses anti-Islam advocacy, anti-terrorism efforts, and legal defenses of figures such as Pamela Geller and Brigitte Gabriel, as well as landmark cases like the first federal constitutional challenge to the Affordable Care Act (Thomas More Law Center et al. v. Obama, 2010), representation of Marines in the Haditha killings investigation, and successful defense of Christian evangelists arrested at the Dearborn Arab International Festival (2010). Muise has also handled multiple challenges to speech restrictions and religious discrimination, co-authored scholarly work on the ACA in the Journal of Health Politics, Policy, and Law, and appeared on national media including Fox News programs and The O'Reilly Factor. Federal judges have praised him as a leading expert in religious freedoms and speech protection, and he was named Appellate Lawyer of the Week by the National Law Journal in 2011.

Prior to founding the AFLC, Muise served as Senior Trial Counsel at the Thomas More Law Center, a conservative Christian nonprofit law firm in Ann Arbor, Michigan, founded by Domino's Pizza magnate Tom Monaghan, where he advanced Christian advocacy and constitutional rights. His professional background includes a distinguished military career as a United States Marine Corps Judge Advocate (JAG officer), achieving the rank of major before resigning in 2000. While on active duty as a captain, he attended the University of Notre Dame Law School, graduating summa cum laude with a Juris Doctor in 1997. After his military service, he worked as a federal prosecutor with the U.S. Department of Justice before joining the Thomas More Law Center.

Throughout his career, Muise has been involved in numerous lawsuits representing conservative and Christian interests, addressing issues such as religious expression, immigration, national security, pro-life advocacy, and the defense of religious expressions in public spaces. As a Catholic speaker and advocate, he has addressed topics including pro-life issues, relationships, and social concerns from a conservative Christian perspective. He has testified before U.S. House committees on government oversight and judiciary matters and has publicly opposed policies associated with President Joe Biden. Muise’s work often positions him adversarially against organizations such as the Council on American-Islamic Relations (CAIR), led by Nihad Awad, in efforts to challenge what he sees as Islamist influences in American society. He is recognized as a key figure in networks advocating for traditional values and opposing secular or multicultural policies, with professional ties to prominent conservative organizations and NGOs. His organization's cases have drawn controversy for being perceived as anti-Muslim, leading to criticism from civil rights groups, with accusations that the AFLC promotes Islamophobic narratives, although Muise maintains that his work protects constitutional freedoms. While Muise himself has no documented personal legal troubles or scandals, his litigation history includes defending clients accused of hate speech and coordinating legal opposition against perceived adversaries in Islamist advocacy.