Earlier quoted context omitted.
The fact that multiple people very close to Trump (Manafort, Stone, Gates, Flynn), both personally and operational, met with Russian intelligence agents and assets helps the argument that the DOJ should be looking into Trump himself.
Hmm, should they likewise look into J Kerry meeting with foreign diplomats whilst not being in the then current administration too?
Otherwise it's just a private citizen meeting with foreign diplomats, which happens all the time and there's nothing nefarious about that.