Trump is dirty and we all know it.
Do you think that saying "we all know it" will force other people to agree that it is true? Because no, I don't know that Trump is "dirty", nor do I even think he is. So we don't all "know it."
I think he says a lot of stupid stuff, but I don't think he's a traitor or had a quid pro quo with the Russians. He's a businessman, and had business dealings in Russia, and so met with Russians. There is nothing illegal or unethical about that - so did tons of other businessmen. Nor do I think he colluded with the Russians -- he didn't need to. They already thought Obama's policies towards them regarding sanctions and Syria were nuts, and a fair number of Americans agreed with that. The Russians backed the guy with whom they thought they could have better relations, just as countries have done since time immemorial.
No conspiracy required.