Republicans are fond of bashing President Barack Obama.
Perhaps. Republicans should brag about their very own Richard M. Nixon, the only President in the history of the United States of America to have resigned from the office of the Presidency and who did so in disgrace.
Take a look at the following embedded link:
Herblock's History - Political Cartoons from the Crash to the Millennium, “I am Not a Crook”
You may also see some interesting stuff in this other embedded link:
'I Am Not A Crook': How A Phrase Got A Life Of Its Own
Watch and listen: