WASHINGTON — Only about a third of Americans believe the Supreme Court decides cases based on the law alone, according to new polling data about the court.

According to the new poll, Americans believe the Supreme Court justices are political, letting their personal views sway their decisions — an opinion held across party lines. And more than three-quarters of Americans oppose the Citizens United ruling four years after the Supreme Court handed down the landmark campaign finance decision.

By large margins, Americans say they would also like to see more openness and accountability from the Supreme Court — on topics from access to courtroom proceedings to financial disclosures and ethics rules — as well as an end to lifetime terms.

The polling, done by Greenberg Quinlan Rosner for Democracy Corps and provided in advance to BuzzFeed, comes as the justices are considering the final cases of the term, all of which are expected to be decided by the end of next month, and tracks with other polling from Pew and Gallup showing the court's favorability at historic lows.

In mid-April, the Coalition for Court Transparency asked the court "to consider making the live audio feed of oral arguments publicly accessible" in letters sent to the justices — a move that the new polling shows is supported by 67% of Americans. An even greater portion of respondents, 71%, said television cameras should be allowed to record and broadcast the proceedings live.

Majorities of Republican, Democratic, and Independent respondents all told the pollsters that "the current U.S. Supreme Court justices often let their own personal or political views influence their decisions" — 54% of Democrats, 62% of Republicans, and 63% of Independents, for a total result of 60% of respondents agreeing with the statement. Only 36% of respondents agree that "the current U.S. Supreme Court justices usually decide their cases based on legal analysis without regard to their own personal or political views."

Specifically regarding the Supreme Court's Citizens United campaign finance decision from 2010, respondents were told: