On Monday's broadcast of CNN's "The Source," former Defense Secretary and CIA Director Leon Panetta said he has no regrets about signing the 2020 letter that incorrectly claimed that the Hunter Biden laptop story was Russian misinformation and claimed that he signed the letter "to make the American people aware that the Russians deliberately were engaged in a disinformation campaign" and he has "seen no evidence to the contrary that Russia has not engaged in that kind of disinformation campaign."