This week, a federal judge sided with Harvard in one of its two lawsuits, blocking an order by President Trump to prevent international students from enrolling.

A group of 18 leading US research universities, including Princeton, MIT, Caltech and Johns Hopkins, asked a federal judge for permission to file legal arguments in support of Harvard University in its high-stakes showdown with the Trump administration over more than $2 billion in frozen grant money.

Harvard sued in April, claiming the government freeze violates the university's First Amendment guarantee of free speech and federal law governing administrative rulemaking