Actually...that statement is inaccurately framed.
Nunes talking to Trump isn't a crime.
Lynch talking to Clinton isn't a crime.
But if Nunes was talking to Trump about obstructing the Russia investigation...that could be a crime.
And if Lynch was talking with Clinton about suppressing the Clinton investigation...that could be a crime.
Opposition to the investigation is not obstruction of justice.
No it isn't.
But actively attempting to obstruct/derail it...is. Things like pressuring officials to stop, demands of personal loyalty...lying to the FBI...those are concerns.
There is to date no evidence that the Trump campaign, transition team or administration committed any crime in collusion with the Russian government or that it supported any cover up of any crime committed by anyone associated with it, and since there never was a legitimate legal reason to begin the investigation, if justice were the goal, there never would have been an investigation.
All of that is part of an ongoing active investigation so we aren't going to be privy to much evidence. To be honest, I strongly suspect that the investigation will reveal some interesting things. Like money laundering. The sanctions effected the Russian oligarchs and government quite a bit, and it wouldn't surprise me - given the lack of transparency into his finances - if Trump and some of his campaign members were involved. But that is just guessing. There was a powerful legal reason to begin the investigation - I can't believe you wouldn't acknowledge it - and that is the Russian attempt to influence our election in Trump's favor. This has been by now, well documented. That doesn't mean Trump colluded but it very surely means it needs to be looked at if our electoral process is to retain any integrity in the future.
Mueller's mandate is to oversee the investigation into Russian tampering in the 2016 presidential election. And that includes looking at the various campaigns.
Justice comes later - when people are indicted, tried and convicted or exonerated. Justice is preceded by investigation.
The major crime committed was by the FBI when it committed perjury to obtain a surveillance warrant and
Specifically - what perjury? Do you have access to the FISA warrent because as of this point, it has not been released and if it has not been you have no way of knowing what evidence was given to obtain it.
On the other hand - we DO know that:
Michael Flynn has pleaded guilty to lying to the FBI (that is a crime).
George Papadopoulous has pleaded guilty to lying to the FBI (that is a crime).
Paul Manafort has been indicted on multiple charges which including money laundering, conspiracy and tax fraud. (all serious crimes).
Since there never was a reasonable basis for suspecting that the Trump campaign, transition team or administration had committed a crime in collusion with the Russian government, the investigation, itself, is a violation of the Constitution and is a crime.
I would say there is a reasonable basis - more than reasonable. In fact - if it were Clinton and not Trump, I'm sure you'd be all in.