They won’t block left wing judges, they’ll block all judges.
Check out this Wikipedia page:
The day Republicans take over the Senate you can carve that page in stone.
Also there’s a shit ton of other government positions that require Senate approval and unless Mitch is feeling particularly pro-Joe on a given day, a single republican senator can keep them from even getting a vote.
e.g.
On February 7, 2014, Obama nominated Cassandra Butts to be the Ambassador to the Bahamas and that’s not usually a role that anyone gives a shit about.
The senate held one committee hearing on this nomination but held no vote and the 113th Congress ended and the nomination lapsed.
Obama nominated her again for the same position on February 5, 2015. The foreign relations committee referred her nomination to the full senate on May 21, 2015. Then Ted Cruz got involved and enacted a blanket block on all State Department nominees because he didn’t like the Iran Nuclear deal. Cruz eventually lifted those holds and somehow Ted fucking Cruz is not the villain of this story.
Enter Tom Cotton. He jumped in to block this nomination and two others (Amb. Sweden and Amb. Norway) because he was mad about something the Secret Service did. Cotton later dropped the Sweden and Norway holds but maintained the hold on Butts.
Frank Bruni (NYT) interviewed the people involved and wrote an article on the whole affair. Here’s the paragraph from that article about why Cotton wouldn’t drop his hold on Butts.
Cotton eventually released the two other holds, but not the one on Butts. She told me that she once went to see him about it, and he explained that he knew that she was a close friend of Obama’s — the two first encountered each other on a line for financial-aid forms at Harvard Law School, where they were classmates — and that blocking her was a way to inflict special pain on the president.
That’s not really a legitimate use of the advise and consent power. That’s being a dick just to be a dick.
Expect a lot more of that if the Republicans take the Senate.