Audio clip:

It didn't take long for critics of President Trump to call his sudden dismissal of FBI director Jim Comey "Nixonian".

Democrats and liberal pundits compared the Tuesday evening firing of Comey to the infamous "Saturday Night Massacre", or when President Richard Nixon fired independent special prosecutor Archibald Coxon October 20, 1973, in the middle of the Watergate scandal. Nixon's decision led to the resignations of Attorney General Elliot Richardson and Deputy Attorney General William Ruckelshaus.

But Nixon speechwriter and adviser Patrick Buchanan says Comey's dismissal was 'small potatoes' compared to that weekend night in 1973.

On Wednesday's show, Buchanan told Tom what really happened in the White House the hours before the Saturday Night Massacre and why it was nothing like what happened this week.

While the FBI is investigating possible collusion between the Russians and the Trump campaign, the Watergate investigation was much farther along.

Buchanan goes in to great detail in his new book, "Nixon's White House Wars: The Battles That Made and Broke a President and Divided America Forever".

LISTEN AS Pat Buchanan explains why the left is wrong to compare Trump's troubles to the Watergate scandal.