PORTO, Portugal — European far-right activists advocating for the mass deportation of immigrants and their descendants are getting a boost from the Trump administration’s embrace of their key catchword: remigration. Some 500 activists and influencers gathered south of Porto on Saturday to discuss the concept, once a fringe term only whispered in far-right circles. The United States’ former Border Patrol chief Gregory Bovino and American white nationalist Jared Taylor were VIP guests at the