Saddam's non-existent WMDs? Reported by the CIA under an presidential administration that was clutching for any reason to go to war with Iraq.
Gulf of Tonkin? Again, the CIA reporting on something that buttressed the case for war. Again, aligned with the then-presdential administration's desire to escalate things in Vietnam.
The DNC hack is reported by the CIA to be Russia. The current presidential administration has full-throated in their bias toward Russia and against any supposed pro-Trump Russian interference in the 2016 election. And the CIA still says a highly-damaging (to the Democrats' electoral chances) email dump was orchestrated by Russia.
One of these things isn't like the other.