They claimed they were looking for CSAM. There's a border search exception to the fourth amendment that says CBP can search your phone at the border. You aren't

They claimed they were looking for CSAM. There's a border search exception to the fourth amendment that says CBP can search your phone at the border. You aren't required to give them a password (but possibly a fingerprint or facial scan) but they can temporarily sieze it (and do god knows what to it).