Bill Clinton came the closest, but even then the Dems ha the votes, same way now republicans would in the end...Doesn't really matter. If they were smart, they'd realize that even if they win, they lose.
He won't be removed from office. They gain nothing, just waste the people's time.
Republicans were smart enough to know that, so didn't bother with impeaching Obama, even though, with all his illegal executive orders, he gave them plenty of opportunity.