Yes.
Alexander, Paul (2002). Man of the People: The Life of John McCain
McCain also branched out and worked with Democratic senators. He was a member of the 19911993 Senate Select Committee on POW/MIA Affairs, chaired by Democrat and fellow Vietnam War veteran John Kerry, convened to investigate the fate of U.S. service personnel listed as missing in action during the Vietnam War. The committee's work included more visits to Vietnam and getting the Department of Defense to declassify over a million pages of relevant documents.[79] The committee's final report, which McCain endorsed, stated that, "While the Committee has some evidence suggesting the possibility a POW may have survived to the present, and while some information remains yet to be investigated, there is, at this time, no compelling evidence that proves that any American remains alive in captivity in Southeast Asia."[80] After many years of disliking Kerry due to his actions with Vietnam Veterans Against the War,[81] McCain developed "unbounded respect and admiration" for Kerry during the hearings.[81][82] The actions of the committee were designed to allow for improved ties between the two countries;[83] McCain pressed for normalization of diplomatic relations with Vietnam, partly because it was "a time to heal ... it's a way of ending the war; it's time to move on,"[84] and partly because he saw it in the U.S. national interest to do so,[84] in particular envisioning Vietnam as a valuable regional counterbalance against China.[85] In 1994 the Senate passed a resolution, sponsored by Kerry and McCain, that called for an end to the existing trade embargo against Vietnam; it was intended to pave the way for normalization.[86] During his time on the committee and afterward, McCain was vilified as a fraud,[84] traitor,[81] or "Manchurian Candidate"[85] by some POW/MIA activists who believed that there were large numbers of American servicemen still being held against their will in Southeast Asia.[84] McCain said that he and Kerry had gotten the Vietnamese to give them full access to their records, and that he had spent thousands of hours trying to find real, not fabricated, evidence of surviving Americans.[79]