NO COLLUSION is 100% clear. No American conspired, or even cooperated with the Russians.
NO OBSTRUCTION is not quite as clear. Mueller refused to make a decision. Barr declared that any obstruction by the president did not rise to the level of the crime of obstruction. That level is very high indeed, as Barr detailed.
Obviously, whether such obstruction (and associated abuse of power) is an impeachable offense is another matter, and a political (not a legal) decision. Pelosi has already said no to impeachment, but this could change with time, although IMO it should not.
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So, as folks told the president long ago, he could have saved a lot of effort and bluster, and simply allow Mueller to do his job. Now, he is the position of celebrating an investigation and investigators that he has attacked almost daily for almost two years.
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IN ADDITION (not part of the report, or even relevant to it)
Trump hired many crooks and foreign agents who are going to jail for their very serious crimes. As an aside, potential crimes by Trump, his family, inauguration team, and his company have been turned over to other prosecutors.
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MY PERSONAL RECOMMENDATIONS TO DEMOCRATS
1) Secure the full Mueller report and as much background as Barr will give. Every bit of evidences unnecessary for any purpose (e.g. grand jury testimony).
2) Accept the conclusions and join a bipartisan push to punish Russia and protect the country against future actions.
3) Make integrity/lying a campaign issue; never have so few lied so much in so short a period of time. The voters can judge. And make business and campaign practices a campaign issue; there is lots already in public documents and there will be lots more to come.
4) While including a mention of Trump and the above issue, focus almost the entire campaign on other issues.
Not just the President, but no American conspired with Russia. The DNC server was hacked
That is what we knew two years ago. Attorney General and Deputy Attorney General reviewed. Trump is exonerated by the Mueller report.