Political maneuvering by the Democrats hoping to unseat Senator Susan Collins shifted into high gear with the news that ICE had ended its surge there.

The Maine senator should be celebrating a triumphant capstone to her first full year heading Appropriations. Instead, she’s expressing concern over ICE violence and scrambling to fund the government—all while facing down a possible reelection campaign that could be her toughest yet.

Collins’ warning adds to intra-Republican pressure on the Trump administration over immigration.

U.S. Senator Susan Collins called for a full, transparent investigation into the fatal shooting of Alex Pretti by federal immigration officers in Minneapolis, stressing the need to determine whether excessive force was used and to improve training and body-camera use for agents.