A Chicago foster care advocate was arrested by U.S. Capitol Police after he allegedly "violently shook" the hand of U.S. Rep. Nancy Mace, an incident the South Carolina lawmaker said was because of her anti-trans views.U.S. Capitol Police arrested James McIntyre, 33, co-founder of the Illinois chapter of Foster Care Alumni of America, around 6 p.m. after an incident was reported in the Rayburn House Office Building, a police spokesperson said. Capitol police didn't identify the representative, but Mace posted on X that she was "physically accosted at the Capitol tonight by a pro-tr*ns man. One new brace for my wrist and some ice for my arm and it'll heal just fine." I was physically accosted at the Capitol tonight by a pro-tr*ns man. One new brace for my wrist and some ice for my arm and it’ll heal just fine. The Capitol police arrested the guy.Your tr*ns violence and threats on my life will only make me double down. FAFO. #HoldTheLine— Nancy Mace (@NancyMace) December 11, 2024 People who saw the interaction said it was only a handshake.Elliott Hinkle, a Wyoming foster care advocate, told the Washington Post he saw the interaction during a reception Tuesday night at the Rayburn building. McIntyre reached out for Mace's hand, and she shook it. He shook her hand with both of his, Hinkle said. McIntyre "violently shook" Mace's hand and "made threats," the police report said."What we witnessed was a handshake, a passionate shake, but it didn’t look like an assault or intended aggression,” Hinkle told the Washington Post of the several people he said saw the encounter. He said McIntyre told Mace: “Trans youth are also foster youth, and they need your support.”Details from the incident were first reported by The Imprint, an outlet that covers youth and family news. Hinkle didn't immediately respond to requests for comment from the Sun-Times.Who is James McIntyre?McIntyre faces a misdemeanor charge of assaulting a government official. He was in the building at a time when it was open to the public and was screened by security to enter the building, police said.McIntyre was placed into the custody of the Department of Children and Family Services as a child with his four sisters, according to FosterClub, a group that provides resources and support to young people in foster care. He was separated from his siblings and adopted with two of them, then faced abuse from his adoptive family, the bio said.After turning 18, McIntyre joined the DCFS youth advisory board then formed the Foster Care Alumni of America's Illinois chapter at 21. He has fought for foster kids to be allowed to see their siblings and advocated for better legal protections for kids separated from their parents at the southern U.S. border.He has worked with the Court Appointed Special Advocates of Cook County and Illinois.McIntyre received the Public Citizen of the Year award from the National Association of Social Workers, Illinois Chapter in 2019.“It is a true honor to be receiving the Public Citizen of the Year award from NASW-IL,” McIntyre told Windy City Times that November. “As a former foster kid who knows the dedication to improving the lives of abused and neglected children, social workers saved me.”No one answered when a Sun-Times reporter knocked on the door at McIntyre's home. Mace fundraising off McIntyre’s arrestMace, continuing her anti-trans rhetoric, emailed supporters Wednesday asking for donations spurred by the alleged assault."And these activists will stop at NOTHING to silence anyone who dares defend us," the email reads, followed by options to donate $25 or $50 and sign a petition. "And after last night, it is clear I CANNOT STOP the fight! I’m launching a NATIONAL fight to BAN biological men from entering women’s spaces on ALL federal property."On X, Mace wrote that President-elect Donald Trump called to check on her Wednesday. Just got off the phone with @Realdonaldtrump. Thank you, Mr. President, for checking in on me and for standing up for women. We cannot wait to see you back in the White House.#HoldTheLine— Rep. Nancy Mace (@RepNancyMace) December 11, 2024 Last month, Mace garnered controversy by introducing a resolution to bar transgender women from using female restrooms on Capitol Hill. The move came after Sarah McBride of Delaware was elected, making her the first openly transgender woman set to serve in the House. While the resolution did not name the Delaware representative-elect, Mace told the Post that "it's 100 percent about McBride."Mace's office and the Illinois chapter of Foster Care Alumni of America, McIntyre's foster care group, didn't respond to requests for comment. The U.S. Attorney's office, which handles criminal charges, didn't respond to questions about McIntyre's charges or court date.