Im taking a greyhound from California to Wisconsin,will they have a bag search or pat down?

There will be a bag search but not by hand, at least I think so. The only way there would be a pat down or bag search, would be if there was something in your bag that wasn't supposed to be in there when it went through the security check. Like, if you had a laptop in your bag or coins in your pocket, a little beeper will go off telling the security guards that somethings not right. Then they'd check your bags by hand and pat you down.