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Yes. Several times.
Absolutely not. In fact, President Obama's sister lives in Hawaii and he has visited her several times during his presidency. (She has also come to DC to visit him.) Mr. Obama has a number of friends and relatives in Hawaii, and there is no reason why anyone would ask him not to visit.
Yes, President Obama did visit with Pope Francis in 2014.
No, President Obama did not visit Antarctica during his presidency.
no
Former President Barack Obama did not visit Antarctica during his time in office.
yes
china
Since the president made an official visit to Canada in February 2009, it is certain that he has seen and/or touched all denominations of Canadian money.
no not really
Yes, he and his wife (and sometimes his daughters) visit a few times a year, since they still have close friends there.
The best times to visit Patagonia are during the summer months of December to February when the weather is milder and optimal for outdoor activities. Spring and fall can also be good times to visit as the landscapes are colorful and the crowds are smaller. Winters can be harsh with limited accessibility to certain areas.