Founded by the dynamic but eccentric entrepreneur Ted Turner, CNN (or Cable News Network) pioneered the concept of 24-hours news programming when it launched in 1980 and was the first cable news network to begin broadcasting in high definition in 2007. CNN came into the spotlight in 1986 during their coverage of the Space Shuttle Challenger disaster and more prominently in 1991 during the Persian Gulf War, because the channel was the only outlet which reported from inside Iraq during the initial hours of the American bombing campaign, with live reports by Bernard Shaw, John Holliman and Peter Arnett. Throughout the 1990s, CNN became very infuential as the only major cable news channel. Today, CNN's television personalities include Wolf Blitzer, Erin Burnett, Anderson Cooper and Jake Tapper. The presidency of Donald Trump has led to many prominent controversies involving CNN. The network was accused of bias during its coverage of the 2016 campaign; current CNN president Jeff Zucker defended its extensive coverage of Trump, noting among the Republican candidates, he was the most willing to give on-air interviews. Likewise, there were accusations by both Trump and supporters of Bernie Sanders, that CNN focused too much on Democratic nominee Hillary Clinton; during his speech at the 2017 Conservative Political Action Conference (CPAC), Trump referred to CNN as the "Clinton News Network". CNN’s work surrounding the 2016 elections has also led some critics to assert that Jeff Zucker is transforming political coverage into the sensational format of sports and entertainment programming.