Trump lashes out at Mueller ahead of Wednesday's testimony; Dems, GOP preparing to question Mueller on report findings; Massive protests in Puerto Rico after gov. refuses to resign

Trump calls four Dem congresswomen of color "racist"; Trump: Four Dem congresswomen of color are "easy to handle"; Nadler: Mueller lays out Trump's high crimes & misdemeanors; Justice Dept. does not have a copy of Mueller's opening statement; Sources: Dems focusing on five specific areas of obstruction; Republicans plan to question Mueller on origins of probe; Trump says he's "best thing" to happen to Puerto Rico; Trump says U.S. is "ready for the absolute worst" with Iran; Iran claims it arrested 17 Iranians accused of spying for the U.S.; Trump says it's "totally false"; Warren says financial crash is coming, unveils new plan; Biden says he supports $15 minimum wage for campaign staffers, jabbing Sanders amid pay controversy; "Avengers: Endgame" passes "Avatar" as highest-grossing movie ever; "Lion King" shatters multiple records after opening weekend

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