Preserve its mission?
And exactly what mission is that?
Same as ever: fighting the Cold War.
The CIA acts as an FBI outside the USA. The FBI is the domestic mission, the CIA is the international arm.
Today it is in part compromised, subverted.
Today, there is a blurring between the jurisdictions, missions of NSA, CIA, FBI.
I don’t think the CIA will be taken down but it may be demolished, relocated temporarily while rebuilt.
The Russians!
Overthrowing rogue governments so even worse folks can take over - and fighting Conservatives who believe in the Constitution....