Are there as many as 80 "Commies" left in the entire US?
A little more, but yeah they're pretty rare in the US. The President of Cyprus is a Communist.
Bout 25 times as many (CPUSA has about 2000 members, according to Wikipedia).
Which means that 4% of their entire party membership is currently serving in the US House of Representatives.
That's probably the most successful level of political entryism the world has ever seen since Darth Sidious.
What about the Connecticut For Liebermanians?
Connecticut For Lieberman was according to Wiki formed by 25 Lieberman(-ites? -iacs?), and presumably includes Lieberman, so 1/26, like 3.85%.