The Verge goes over the current state of travel in the U.S. and risks to data privacy; basically the advice is to leave your devices at home and travel with a dumb burner, or at the very least, disable all biometric logins like Face ID, delete all sensitive information, and make sure it’s been securely wiped from the devices.
If you’re a US citizen, “you have the right to say no” to a search, “and they are not allowed to bar you from the country,” Hussain said. But if you refuse, CBP can still take your phone, laptop, or other devices and hold onto them.