US President Donald Trump is threatening to cut another $1 billion in funding for Harvard University, this time targeting health research, as the administration's row with elite schools escalates. The Trump administration has withheld government funding from Harvard, Columbia, and other universities in response to their tolerance of pro-Palestinian demonstrations. Harvard pushed back last week, rejecting demands for control of its student body, faculty, and curriculum. The administration announced it was freezing $2.3 billion in federal funding to the school and threatened to strip Harvard of its tax-exempt status.