Carl Bernstein argued Thursday that special counsel Robert Mueller’s report on Russian interference in the 2016 election and whether President Trump obstructed justice makes a valid case that the president is a threat to national security.

Bernstein, a CNN analyst, cited his former Watergate colleague Bob Woodward’s book Fear: Trump in the White House, in which Woodward reported that former Cabinet officials believed Trump was not acting in the best interests of the United States and was a danger to national security.