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Mr. Obama is well known for his use of the teleprompter. He made light of it during his speech at the White House Correspondents’ Association dinner over the weekend with a spoof movie trailer about life for Mr. Obama if he lost funding for his teleprompter.

The Sheehan Associates website says that since 1988, Mr. Sheehan “has been called upon to coach” every presidential and vice-presidential debate as well as featured speakers at the Democratic conventions.

“For the Obama and Clinton administrations alike, he has coached Inaugural addresses, States of the Union, prime time addresses and press conferences,” the site says.