U.S. President Donald Trump is threatening to cut another $1 billion in funding for Harvard University, this time targeting health research, the Wall Street Journal reported on Sunday, as the administration's row with elite schools escalated.

US President Donald Trump is planning to cut an additional $1 billion in health research funding for Harvard University, the Wall Street Journal reported on Sunday, as the administration's row with elite schools escalates.

Harvard said it would not bend to the government's demands, prompting the Trump administration to freeze $2.2 billion in funding for the university.