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A rambling, 95-minute stump speech by 2016 Republican presidential candidate Donald Trump this week in Iowa has some in media wondering whether the strain of campaigning is starting to wear on the businessman.

"Does everyone still think Trump is having fun after that performance last night? (Genuinely asking)," BuzzFeed's Mckay Coppins asked.

The Washington Post's Chris Cillizza asked, "Dare I ask: Is this the beginning of the end for The Donald?"

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