Most in the poll say the President should testify for Mueller’s investigation if asked (70% say so), and the views of that group have shifted as the public wrangling over the terms of an interview has gone on.

Although the overall assessment of the President’s handling of the Russia investigation remains largely negative (55% disapprove), his approval numbers have shifted slightly more positive: From 29% approval in June to 34% approval now.

That shift is driven almost entirely by those who think the President should testify. Among that group, 29% now approve of the President’s handling of the investigation, up from 20% in June, while among those who say he should not testify, approval has held steady at 52%.