This is a lie.No Collusion, No Obstruction, Complete and Total EXONERATION. KEEP AMERICA GREAT!— Donald J. Trump (@realDonaldTrump) March 24, 2019
How do we know?
This is what AG Barr actually wrote:
The Special Counsel states that “while this report does not conclude that the President committed a crime, it also does not exonerate him.”Donald Trump lied.
Side note: Robert Mueller (as seen above in the partial quotation from Trump's AG) could not exonerate Donald Trump.