Washington (CNN) More than half of US voters want President Donald Trump impeached and removed from office, according to a Fox News Poll out on Wednesday.

The poll marks the fourth in two days that showed public opinion is shifting on the impeachment inquiry. A formal impeachment inquiry, launched by the House last month, centers on Trump's July phone call with Ukrainian President Volodymyr Zelensky, after a whistleblower filed a complaint about the call. A transcript of the conversation released by the White House shows Trump repeatedly pushed Zelensky to investigate former Vice President Joe Biden and his son, Hunter. There is no evidence of wrongdoing by either Joe or Hunter Biden in Ukraine.

The Fox News poll found 51% of registered voters want Trump impeached and removed from office and another 4% want the President impeached but not removed from office. Forty percent of respondents were opposed to impeachment altogether.

The poll also showed an increase in support for impeachment across a number of demographics compared with July. Support for impeachment was up 11 points among Democrats, 5 points among Republicans and 3 points among independents.

Impeachment support was up 5 points among evangelical Christians and 8 points among white men without college degrees -- two constituencies key to Trump's 2016 election.

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