US House Speaker Mike Johnson on Wednesday was heckled during a visit to Columbia University amid spreading protests against the Gaza war at US campuses. Johnson criticised Columbia officials, accusing them of losing control and called for university president Nemat Shafik to resign during a tense news conference. The crowd repeatedly interrupted him, booing him and other Republican lawmakers present. “We just can’t allow this kind of hatred and antisemitism to flourish on our campuses, and it must be stopped in its tracks. Those who are perpetrating this violence should be arrested. I am here today joining my colleagues, and...