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WASHINGTON, DC - JULY 27: Sen. John McCain (R-AZ) holds a news conference with fellow GOP senators to say they would not support a 'Skinny Repeal' of health care at the U.S. Capitol July 27, 2017 in Washington, DC. The Republican senators said they would not support any legislation to repeal and replace Obamacare unless it was guaranteed to go to conference with the House of Representatives. (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - JULY 27: Sen. John McCain (R-AZ) holds a news conference with fellow GOP senators to say they would not support a 'Skinny Repeal' of health care at the U.S. Capitol July 27, 2017 in Washington, DC. The Republican senators said they would not support any legislation to repeal and replace Obamacare unless it was guaranteed to go to conference with the House of Representatives. (Photo by Chip Somodevilla/Getty Images)

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McCain says prognosis is 'very, very serious'

Arizona Sen. John McCain spoke about his cancer prognosis and his will to continue working while he undergoes treatment.

McCain says prognosis is 'very, very serious'

Arizona Sen. John McCain spoke about his cancer prognosis and his will to continue working while he undergoes treatment.