"Is the Chicago FBI field office compromised" - Have you ever heard about Chicago? :P 99.99% certain.
The Chi field office head, Jeff Sallet, has an interesting background.
Busted "100 organized crime figures, closing the book on 30 cold case murders" in NY
Tracked down 9/11 finances.
Oversaw the response to the Boston bombing.
Busted a bunch of dirty FBI agents. Hmmm
https://www.chicagotribune.com/news/local/breaking/ct-jeffrey-s-sallet-named-new-division-chief-of-chicago-fbi-named-20170826-story.html
https://www.fbi.gov/news/stories/us-seeks-to-recover-1-billion-in-largest-kleptocracy-case-to-date
https://www.isenberg.umass.edu/news/alumni-profile-jeff-sallet-fbi-agent-forensic-accountant
This. It was already Israel's. At least as much as any other parts of Israel is theirs. It's too important geographically. They were never going to give it up without a war.
Svestapol Crimea was the real goal in Ukraine. There was never a reality where Russia was going to give NATO that base.
Logistics and geography are important in war.