Dr. Katrina Armstrong, Columbia University’s interim president, resigned Friday amid the school’s tussle with the Trump administration over federal funding and criticism around its response to pro-Palestinian protests on campus.

Following the announcement, the school’s board appointed Claire Shipman to serve as acting president. Armstrong, the second Columbia leader to step down in less than a year, will return to lead the school’s Irving Medical Center, according to a news release.

“It has been a singular honor to lead Columbia University in this important and challenging time. This is one of the world’s great universities, in its most vital city, and I am proud to have worked with extraordinary faculty, students, and alumni,” Armstrong wrote in a statement. “But my heart is with science, and my passion is with healing. That is where I can best serve this University and our community moving forward.”

The leadership shake-up at the influential school comes after the federal government axed $400 million in grants to Columbia University following an antisemitism investigation into the institution.