Harvard University is challenging the Trump administration’s decision to bar the Ivy League school from enrolling foreign students

A federal judge blocked the Trump administration's attempt to ban foreign students from attending Harvard within hours of the university filing its lawsuit Friday. Why it matters: Harvard is becoming the litmus test of how far the Trump administration will go to try taking down colleges and universities it considers to have liberal biases.

This is the second federal lawsuit the school has filed against the Trump administration over the past month as their feud rages.