Miami Mayor reacts to planned immigration raids; Many undocumented families living in fear of upcoming raids; WH hosts right-wing internet personalities at social media summit, not tech leaders; Twitter & Facebook not invited to White House media summit; Biden unleashes on Trump in foreign policy pitch; Biden: world sees Trump as "insincere, ill-informed and impulsive"; Biden: If I'm president, there will be "no more Charlottesville's, no more Helsinki's"; Biden: Foreign policy can't be driven by "Twitter Tantrums"; WSJ: State Dept intel analyst resigned after Trump admin blocked part of his testimony on threat from climate crisis; Miami's poor pressured to move to areas more like to flood via Knit