“Does anyone know what a contempt vote means besides some political ammunition?”
Not certain, but it Could lead to a charge of interfering with a Congressional Investigation which is good for 5 years, and if it involves foreign terrorism that’s good for 8 yrs.
They can make him talk, give up the documents, if they really want to.
The Democrats just want to get the issue off the news. A vote for contempt would result in a referral for criminal charges, which will go to an Obama appointed prosecutor and die there.