The headquarters of the Republican National Committee was put on lockdown Wednesday morning after two vials of blood were discovered in a package addressed to former President Donald Trump — with the party’s chairman calling the incident a “biological attack.” “Today, vials of blood were sent to RNC Headquarters in DC. We are thankful to law enforcement, who responded quickly and ensured everyone’s safety. The lockdown has been cleared and staff has resumed their office duties because we remain unintimidated and undeterred in our efforts to elect President Trump to the White House,” RNC boss Michael Whatley said in a...