Chain email’s Obama joke unconfirmed

An email bouncing around Texas says that a clown at the 2012 San Angelo rodeo performed a skit with a racially tinged punchline mocking President Barack Obama. And, the letter says, the crowd responded with "an immediate deafening roar and standing ovation -- 6,000 strong. ...It lasted for 3-4 minutes... 100+ db (decibels) at least."
Did a crowd of Texans cheer, and did the clown tell, a joke calling Obama a "black imposter"?
Our interviews of the clown, rodeo officials and audience members led us to conclude that a joke was told about the president, but it did not have a racial reference and the audience did not respond with a standing ovation.

Read our full fact-check here.