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Pfizer Inc.

All the campaign is a stage for Donald Trump

All the campaign is a stage for Donald Trump

Bemoaning the migration of U.S. jobs overseas, Donald Trump reminded a New Hampshire audience this week that Pfizer was moving its headquarters to Ireland.

"No more Viagra!" a man hollered.

"Shout that out once more," Trump responded with a grin.

"No more Viagra!"

The Republican presidential candidate opened his arms wide as laughter spread. "I didn't say it," he deadpanned. "Do they make Viagra? Is it Pfizer? … This guy's a comedian."

So is Trump, whose political rallies often resemble stand-up comedy shows. Funny, engaging, insulting, cocky and vulgar, the former reality television star remains a...