On the campaign trail last year, then-candidate Donald Trump proposed handing US residency cards automatically to international students when they earn diplomas, bemoaning that they were leaving to form successful companies in China and India.

Now back at the White House, Trump's message has changed drastically.

Hoping to crush an academic establishment he sees as his enemy, Trump has launched unprecedented actions against international students that experts warn are likely to decrease enrollment and could trigger a brain drain of top talent.

In a matter of days, the Trump administration has sought to bar all foreign students from Harvard University, one of most prestigious US institutions, and Secretary of State Marco Rubio has vowed to "aggressively" revoke visas to students from China, long the top source of students to the United States although recently eclipsed by India.

Rubio has already yanked thousands of visas, largely over students' involvement in activism critical of Israel's offensive in Gaza but also over minor traffic violations and other infractions.

"The US, historically, has a reputation around the world of having a very open........

© International Business Times