Mueller prepares to testify as DOJ says he must stick to report; Ex-prosecutor who knows Mueller well talks key questions; Biden unveils criminal justice plan ahead of Dem debate; Next U.K. Prime Minister Boris Johnson has history of gaffes

Sources: Trump irritated, not anxious, ahead of Mueller testimony; Mueller makes last-minute ask to swear in deputy for hearing; Trump: "Pleased" with deal that would add to soaring national debt; GOP divided over budget plan, some call it "best possible deal"; Trump in 2016: I could get rid of debt in eight years; Trump's top economic adviser: Trump will be tougher on spending after re-election; Trump sues to stop release of his state tax returns; Trump Lawyer: Officials' acts are "political retribution"; NY Attorney General: Trump hides behind lawsuits; Booker to Biden: "You created this system. We'll dismantle it."; Biden Campaign: Biden knows people will try to "weaponize his service in congress against him"; Gabbard: Harris "Not Qualified" to be commander in chief

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