Funny Latin phrases: quid pro quo

Here is the REAL question, will democrats withhold aid to Israel, if Israel doesn’t comply with their demands? The answer is a resounding yes if you ask top democrats including presidential campaign front runners.
If Trump is impeached, then surely Bernie and the crew should ALSO be impeached.
Difference is that dems are forcing compliance with threats. Trump never threatened or even discussed quid quo pro with Ukraine. Right?? (transcript of Trump’s call to the Ukrainian president)

Reference to statements by Democrats regarding quid pro quo that they intend to use against Israel.

https://news.grabien.com/story-democrats-hell-yes-well-use-quid-pro-quos-advance-our-politi

https://townhall.com/columnists/williammarshall/2019/11/04/bernie-and-his-outrageous-quid-pro-quo-n2555789

What is quid pro quo exactly, and what does this funny Latin phrase mean?

quid pro quo
/ˌkwid ˌprō ˈkwō/
noun
a favor or advantage granted or expected in return for something