A Fox News poll released this week found that most Americans believe the Russia probe will yield impeachable offenses and a solid two-thirds of the public think completing the probe is important to some extent. The Hill writes:
Fifty-six [percent] of respondents in the poll said they believed Mueller’s probe will find that Trump committed the offenses. And 67 percent say they believe it’s at least somewhat important that Mueller’s investigation continues.
However, 71 percent said they think that Trump will fire Mueller before the probe is over. [...]
Sixty-four percent of respondents in the poll overall also said they believe Mueller is treating the White House fairly.
To recap the majority opinions: Mueller’s probe is important, fair, and will likely produce offenses that could end Trump’s presidency; but Trump will try to kill it before it reaches completion.
The White House has been sending mixed signals lately on the Mueller probe. On one hand, Trump's aides have said recently he has "no intent" to fire the special counsel and, on the other, they have asserted Trump has the authority to do it.
On Fox & Friends Thursday, Trump himself said he tries to “stay away” from interfering with the Justice Department but warned, “at some point, I won’t.”