<p>MINNEAPOLIS — Hillary Clinton delivered a show of force on Friday meant to make one thing abundantly clear to Democratic leaders, Bernie Sanders, and Joe Biden: She is the boss.</p><p>Coming off two weeks of breathless speculation about the vice president’s ambitions, Clinton now looks like she’s nearly locked up the support of party elites, something she critically failed to accomplish in 2008.</p><p>A phalanx of Clinton’s top aides — including campaign manager Robby Mook, political director Amanda Renteria, and top organizing official Marlon Marshall — worked party influencers at the Democrats’ candidate cattle-call here and at a private happy hour at the W Hotel bar on Thursday night, while trying to calm those with questions about the email controversy.