All tourists - including those from Britain - will have to undergo a social media screening before being allowed entry into the US under new plans being considered by the country's border force.
At the moment, Britons are among those who can visit for up to 90 days without a visa.
They just have to obtain an electronic travel authorisation, known as an ESTA, for $40 (£30).
The potential social media mandate being proposed by Customs and Border Protection (CBP) would apply to anyone visiting, whether they require a visa or not.
According to a notice published in America's federal register on Tuesday, foreign tourists would need to provide their social media from the last five years.
At the time, Mr Trump suggested certain networks should have their licenses revoked over a lack of support for him.
An agreement has not yet been reached, so the fight between the Ivy League university and Mr Trump rages on. »