Dr. Mehmet Oz, a celebrity physician known as the host of the "Dr. Oz Show," announced on Tuesday that he would run for Senate in Pennsylvania, jumping into a crowded Republican primary. Dr. Oz said he had been motivated to run because of the pandemic. In an online statement announcing his candidacy ... he criticized official responses to Covid-19 in terms embraced by conservatives. The pandemic, he wrote, has been mishandled by "elites" who stifled dissenting opinions, "mandated" policies and "closed our parks, shuttered our schools, shut down our businesses and took away our freedom." Dr. Oz, 61, is a heart surgeon who first came to the public's attention as a regular guest on "The Oprah Winfrey Show" before starting his own long-running daytime show, where he dispenses medical advice. He has also appeared regularly on Fox News discussing Covid-19, sometimes making controversial statements. In April 2020, citing a medical journal, he said that opening schools "may only cost us 2 to 3 percent in terms of total mortality" of the population. The previous month, Dr. Oz promoted hydroxychloroquine to fight the coronavirus, even though researchers at the time warned that the drug was unproven. In his statement announcing his run on Tuesday, Dr. Oz positioned himself more aggressively as a foe of elites and as someone who has "fought the establishment" throughout his career. "Elites with yards told those without yards to stay inside, where the virus was more likely to spread," he wrote.