It was 4 .. All of them under the direction of James Clapper who is not a fan of DJT (NYT printed a retraction) 
The Russian in question did not work for or represent the Russian gov.... Her last employment with them as reported was in 2002 ... 
DJT is not required to release his tax returns any more than BHO was required to release his college transcripts 
Some of the folks on the campaign very well have forgotten meetings with Russians ... I have thought about it and if asked I could not detail every meeting i have had where a Russian was present .. or an Indian or a Mexican ... I have a lot of meetings .. I am sure they do as well . what is true is that the meeting was disclosed by both Manafort and Kushner .. just not by DJTJ soooo no cover up .. 2 of the 3 reported it in their statements . DJTJ overlooked it as it was short and there was no substance .  
Viability .. is nothing more than who can win ..Gary Johnson was a throw away vote