Do police have a legal right to search semi - truck without cause just because the driver has a CDL Licence?

I think if the driver said no, the cops would just call DOT and the driver would have to go over all his logs and it would delay him a long time -

welcome to the real world eventually i hope that we all find out the facts behind our illusion of serve and protect really id search and destroy. probable cause is a lose term giving the cops the loophole to trash our rights. the only times i was arrested was when they broke the laws that are there to protect us lie in court and who they gonna believe me or the " upstanding officer of the law sworn to uphold the law. and of corse when i ask my public pretender to view the recorded video which is on all California cops cars. that would show my right being trashed and my innocence its undecernable but if it proved my guilt I'm sure it would have been clear and quite useable. we need revolution and a way to expose the travesty happening in this modern nazi republic.

The police has no right to search the vehicle without a warrant.. Unless the driver or anyone in the looked suspicious.. The police could look inside through the windows and if ever he spots something (drugs or weapon) he then could search the vehicle for more evidence...

There's a difference between a commercial truck and a private car. You have a right to privacy in your possessions, but a commercial truck is not "your possessions," it's the company's. It's not having a CDL license that gives them the power, it's the vehicle you're driving. Industries are regulated and have a lessened expectation of privacy than a private citizen, so their possessions can be subject to search.

Reasonable cause, basically yes .