Trump has made heavy use of Twitter both in his 2016 presidential campaign and during his time in office.

President Donald Trump's administration on Wednesday renewed its claims of political favoritism among search engines and social media platforms by launching a survey that encourages people to report online censorship.

"SOCIAL MEDIA PLATFORMS should advance FREEDOM OF SPEECH. Yet too many Americans have seen their accounts suspended, banned, or fraudulently reported for unclear 'violations' of user policies," read the online survey.

It asks for respondents' contact details along with information about instances in which they believe they were censored online.

"No matter your views, if you suspect political bias caused such an action to be taken against you, share your story with President Trump," the survey continues.

Trump has made heavy use of Twitter both in his 2016 presidential campaign and during his time in office.

Yet he's repeatedly denounced "collusion" between tech giants and his political opponents, and at one point accused Google of rigging search engine results to favor negative news coverage about him.

His political allies have echoed the allegations while providing little evidence of bias. Social media and search engine companies have denied the claims.