WASHINGTON – President Donald Trump says he is "designating" antifa as a major terrorist organization following the Sept. 10 slaying of conservative activist Charlie Kirk. But what is the anti-fascist movement, known collectively as antifa? And what does Trump designating a terrorist organization mean? Authorities have not confirmed any direct links between Kirk’s accused killer, Tyler James Robinson, and antifa, which is more of a broad political concept than an actual organization with members, leadership or a headquarters that can be targeted, experts say. But Trump, Attorney General Pam Bondi and other administration officials have repeatedly blamed left-leaning groups for...