WXIA in Atlanta reports that he was heard saying "I'm exhausted", but continued working.
The last time Carter was in Manitoba was 1993, when he lent a hand at the construction sites for 18 other Winnipeg homes through the Habitat organization.
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Through his work on global issues, he became widely regarded as a better former president than he was a president, having left office profoundly unpopular. According to the update, Carter is "okay and is being taken off site for observation".
"He encourages everyone to stay hydrated and keep building", Reckford adds.
President Jimmy Carter's motorcade parked outside the emergency entrance to St. Boniface Hospital in Winnipeg.
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Somebody that loves their family and treats their friends right - and treats me right'. "Also, just outing me on social media . I know how I treat my friends and family and kids and that's all I'm anxious about'.
A subsequent statement from the Carter Center echoed the spokesman's remarks.
Carter's many years of working with the charity is well-known.
"Every night I'm thankful that I had another day of work and blessings and I get to wake up in the morning", he said.
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Carter and the former first lady are in Winnipeg, where the weather is sunny and in the high 60s, working on their annual Habitat for Humanity "Carter Work Project".