This is one of the most fucking depressing things I've read recently (and there's been a lot of competition). Some excerpts:
Some 79% of Republicans approved of his handling of the Russian president at the post-summit press conference, according to an Axios/ SurveyMonkey poll of 2,100 people. An even higher share, 85%, think the justice department investigation into Russia’s meddling in US elections is a distraction.
...
There is little reason to believe that a Putin sequel will be a deal breaker for rank and file Republicans. While the conventional wisdom on Monday held that Trump was “Putin’s puppet”, many Americans were consuming a different narrative. The Fox News host Sean Hannity told the president in an interview that night: “You were very strong at the end of that press conference.” The show had about 4 million viewers, well ahead of other cable news networks.
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Indeed, even if special counsel Robert Mueller produces evidence of collusion between Trump and Russia, it might not be terminal in the current hyperpartisan climate. Not everyone thinks that Putin’s meddling in the 2016 election was necessarily a bad thing. “I’ll try not to sound too awful, but I want to thank the Russians for interfering with our election to stop Hillary Clinton from becoming president,” said one caller to the C-Span network during Monday’s summit.
Do Republicans disapprove of Trump's meeting with Putin? 'They couldn't care less'
Basically, the article casts the base as low information and apathetic (which we knew already) but draws the conclusion that therefore nothing will be big enough to change their minds, especially as the white evangelicals will overlook literally anything if it gets them another Supreme Court seat. 