` ` Late Show '' host David Frost opened up about 9/11 , politics , religion and more . He said Johnny Carson inspired his show , calling his friendship ` ` a tremendous blessing '' Letterman on ` ` Top Ten '' Carson : ` ` It was a cheap , easy way to refill a category and get some laughs '' Letterman on politics : ` ` For the record , I am a registered independent . ''
`` Late Show '' host David Letterman opens up about 9/11 , politics , fatherhood and more . He said Johnny Carson inspired his career , calling his friendship `` a tremendous blessing '' Letterman on `` Top Ten '' origin : `` It was a cheap , easy way to refill a category and get some laughs '' Letterman on politics : `` For the record , I am a registered independent . ''