Flynn was set up and his only charge concerns his FBI interview. No one knows what is going on with Cohen. Manafort is a long time crook and considering his links to the Bushs his trial should be very interesting.
None of this comes close to impeachment and other than some zealots it's not having much impact on voters. How you take all this probably depends on how you view Comey, Brennan and Mueller. If you think they are hard working, honest, publics servants then you will probably believe what they say. If you think Mueller is a war criminal who promoted lies about WMD in Iraq, that Comey repeatedly framed vulnerable people for terror offences while FBI director and that Brennan has been involved in torture then you might not be so willing to believe them.