Southwest Airlines announced on Sunday that it has launched an internal investigation after one of its pilots allegedly used a phrase that has gained popularity as a signal of opposition against President Joe Biden. The pilot allegedly said “Let’s Go Brandon” to passengers over an intercom during a flight from Houston to Albuquerque on Friday, The Associated Press first reported. Southwest said in a statement on Twitter that it is “conducting an internal investigation” into the incident, and “will address the situation directly with any employee involved.” “Southwest does not condone Employees sharing their personal political opinions while on the job serving our Customers, and one Employee’s individual perspective should not be interpreted as the viewpoint of Southwest and its collective 54,000 Employees,” the statement said. The phrase “Let’s Go Brandon” emerged following a NASCAR race at Talladega Superspeedway in Alabama on Oct. 2, which was won by NASCAR driver …