Sen. John McCain John Sidney McCainAnalysis: Biden victory, Democratic sweep would bring biggest boost to economy The Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE (R-Ariz.) remains much more popular with Democrats than Republicans days after his death, according to a new poll.

The Economist–YouGov poll taken Aug. 26-28 found that just more than half of U.S. adults who identify as Republicans have a favorable view of the late senator, while 75 percent of Democrats have a somewhat or very favorable view of McCain.

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Nearly 40 percent of Republicans said that they had a somewhat or very unfavorable view of McCain, according to the poll, while only 15 percent of Democrats had an unfavorable view of McCain.

McCain, who died last week at the age of 81, was memorialized in Arizona by family, friends and even onetime political adversaries this week at a service that included speakers including former Presidents George W. Bush and Obama.

During his last term in the Senate, in which he served from 1987 until his death, McCain directly challenged the Trump administration and his fellow Republicans on many issues, at one point casting the deciding vote against a "skinny" repeal of ObamaCare last year.

The Economist–YouGov poll surveyed 1,500 adults for three days directly following McCain's death on Saturday, and it contains a margin of error of 3 percentage points.