Peter Strzok, the senior FBI official who helped lead the initial probe of ties between Russia and the Trump campaign until it was discovered he sent anti-Trump texts, was fired from the agency on Monday, NBC News has confirmed. Strzok, a 21-year veteran of the department, had exchanged anti-Trump texts with FBI lawyer Lisa Page, with whom he had an affair, during the 2016 presidential campaign. Both worked on the Hillary Clinton email investigation and also on special counsel Robert Mueller's probe of possible collusion between the Trump campaign and Russia.