Moderate Sen. Susan Collins backed Tulsi Gabbard’s bid to become director of national intelligence ahead of a key committee vote Tuesday, in a significant boost for the former Hawaii

Collins, a pivotal swing vote on the Senate Intelligence Committee, is expected to play a key role in advancing Gabbard’s nomination as the committee meets on Tuesday.

Tulsi Gabbard has faced scrutiny for her support of Edward Snowden, a former government contractor who leaked information about U.S. intelligence programs.