If Trump colluded with Russia, and Trump knows that proof is imminent, could he use this method to protect himself and the GOP in 2020?

Step 1: Trump Pardons every possible person related to the happenings, then resigns his presidency. And yes, he can pardon people before they ae charged, just as Ford did Nixon.

Step 2: Mike Pence, in his only act as President, pardons former President Trump, then resigns himself.

Pence has yet to be accused of wrongdoing in the matter, and in fact wasn't named as Trump's running mate on the dates that are being looked at, so Pence will not be in need of a pardon.

Step 3: Pence resigns, and House Speaker Paul Ryan, another man who wouldnt have been involved, is next in line.

President Ryan strongly condemns the actions and subsequent pardons and promises a new era of honesty and transparency to the American people and rolls up his sleaves and gets to work, in an era where the Russian investigation is irrelevant and behind us. (No one left to prosecute due to the pardons)

Result: Trump and company ae off the hook, and uninvolved Paul Ryan will likely not be dogged by it in 2020.

If the Russians wanted Trump, then why did they feed the misinformation to Hillary Campaign in the dossier?

You want Collusion? It's slapping you upside the head.

Also, ' Collusion ' is not a word that exists in any legal statute, so you're going to have to find an actual crime. Aside from that, Flynn or Manafort may have not filed required documents or something, but it's never going to reach Trump.

The GOP would be destroyed if any steps in your question actually happened.

COLLUSION IS NOT A CRIME

TRUMP 2020

As long as Hillary ends up in jail

The Mueller investigation is a witch hunt everyone knows that.

even the "experts" at CNN, MSNBC, and so forth have been questioning how quickly, and the all of the sudden charges are. As if they aren't related to the NYT's, and Washington posts recent revelations into uranium one, the dossier, and the email scandals.

Your mom colluded with your dad to make an idiot baby

He can't use a presidential pardon to obstruct the judicial process, oh wait a minute.Arpaio!

If Manafort (or whoever) is pardoned by Trump at the federal level isn't he still open to prosecution by the state?

I don't agree with your conclusion on this statement one little bit "Result: Trump and company ae off the hook, and uninvolved Paul Ryan will likely not be dogged by it in 2020." - I'm pretty sure Ryan, Pence and ilk would be crucified in the world of public opinion if they did what you suggest. Assuming you are correct and such pardons work out that way and the states can't make a case (for whatever reason), it wouldn't stop the details of the scandal from becoming public and hence wouldn't stop the anger over it either.

Well what would Obama do and if trump did that what is the difference.

If there's evidence that the Trump campaign actively colluded with Russia and committed crimes, that would be the most shocking political scandal in American history. It will create a constitutional crisis. It would be the biggest betrayal to the American people and our democratic values.

Even the hardline Republicans in Congress will call for Pence to take the oath of office. Trump won't have the time to pardon anyone. All it takes is two collaborators to testify against Trump to be charged with criminal treason which is punishable by death.