France’s research minister said a French scientist was denied entry to the US this month after immigration officers at an airport searched his phone and found messages in which he had expressed criticism of the Trump administration.
France’s research minister said a French scientist was denied entry to the US this month after immigration officers at an airport searched his phone and found messages in which he had expressed criticism of the Trump administration.
The US Government cannot deny US Citizens from entering the US.* However, they can (and mostly likely will) seize all your belongings and detain you for up to 48 hours. So its best to wipe your devices before crossing the border (both ways). They can deny permanent residents (aka: green card holders) from entry.
*for now
But my real advice is: Unless you are intending to migrate permanently, do not cross the US borders (neither in nor out) under the current administration.