CNN's presidential historian Douglas Brinkley talks about what President Donald Trump's legacy will be once he leaves office, and how the riots at the US Capitol have affected that legacy.

CNN presidential historian Douglas Brinkley and legal analyst Elliot Williams react to President Donald Trump's string of controversial pardons.

Douglas Brinkley, presidential historian and professor, reacts to President Donald Trump saying he will deliver his convention speech accepting the Republican presidential nomination from either the site of the 1863 Battle of Gettysburg in Pennsylvania or the White House in Washington, DC.

CNN's Wolf Blitzer discusses news that the Republican National Convention in Charlotte, North Carolina, will be closed to the press with presidential historian Douglas Brinkley and global affairs analyst Susan Glasser.

CNN's Gloria Borger and presidential historian Douglas Brinkley discuss past presidential campaigns that President Donald Trump attempted to emulate during his rally in Tulsa, Oklahoma.

CNN presidential historian Douglas Brinkley discusses.

CNN presidential historian Douglas Brinkley discusses with Jake Tapper.

Presidential historian Douglas Brinkley responds to President Donald Trump's tweet that appeared to be mocking a reference to the Trail of Tears, the forced relocation of thousands of Native Americans which led to thousands of deaths, and a subsequent post by Donald Trump Jr. online.

CNN contributor Douglas Brinkley says Jared Kushner, senior adviser to President Trump, should be concerned about special counsel Robert Mueller's court filing that stated former Trump national security adviser Michael Flynn gave "substantial evidence" to the Russia investigation.

CNN presidential historian Douglas Brinkley compares the firing of former FBI Deputy Director Andrew McCab