Senator John McCain has called on the Supreme Court to protect US elections from partisan gerrymandering, as the justices consider a high-profile case on the issue that could fundamentally change the way American elections are conducted.

The Republican and his Democratic colleague Sheldon Whitehouse said the court has the power through its decision to “return control of our elections to the people”.

“The Court can clean up a cause of America’s crisis in confidence in our democracy,” the senators wrote in a joint statement. “The American people do not like gerrymandering. It leaves them feeling powerless and discouraged; that their votes are wasted and voices silenced.”

This week at the Supreme Court, lawyers for the state of Wisconsin defended a redistricting plan that gave Republicans many more seats in the State Assembly. An attorney representing Democratic voters, meanwhile, argued that the map – pushed through by the state’s Republican leadership in 2011 – was so partisan that it violated the Constitution.

In 2012, after the adoption of the new map, Republicans won 48.6 per cent of the statewide vote but captured 60 seats in the 99-seat State Assembly.

Mr McCain and Mr Whitehouse also filed a friend-of-the-court brief in the case last month, saying the Democratic voters’ lawsuit against Wisconsin “implicates the effective functioning of American representative democracy.”

The Supreme Court’s consideration of the case comes as members of Congress from both political parties continue to lament how redistricting has become more pervasive and partisan over the last decade.

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Mandel Ngan/AFP/Getty Supreme Court strikes down abortion restrictions WASHINGTON, DC - JUNE 27: Pro-life activists pray on the steps of the United States Supreme Court on June 27, 2016 in Washington, DC. In a 5-3 decision, the U.S. Supreme Court struck down one of the nation's toughest restrictions on abortion, a Texas law that women's groups said would have forced more than three-quarters of the state's clinics to close. Pete Marovich/Getty Supreme Court strikes down abortion restrictions WASHINGTON, DC - JUNE 27: Texas abortion provider Amy Hagstrom-Miller looks on as Nancy Northup, President of The Center for Reproductive Rights speaks to the media outside of the U.S. Supreme Court on June 27, 2016 in Washington, DC. In a 5-3 decision, the U.S. Supreme Court struck down one of the nation's toughest restrictions on abortion, a Texas law that women's groups said would have forced more than three-quarters of the state's clinics to close. Pete Marovich/Getty Supreme Court strikes down abortion restrictions An abortion rights activist holds placards outside of the US Supreme Court before the Court struck down a Texas law placing restrictions on abortion clinics on June 27, 2016 in Washington, DC. The US Supreme Court on Monday struck down a Texas law placing a raft of restrictions on abortion clinics, handing a major victory to the "pro-choice" camp in the country's most important ruling on the divisive issue in a generation. Getty Supreme Court strikes down abortion restrictions Texas abortion provider Amy Hagstrom-Miller wipes a tear as she walks down the steps of the United States Supreme Court with Nancy Northup, President of The Center for Reproductive Rights on June 27, 2016 in Washington, DC. In a 5-3 decision, the U.S. Supreme Court struck down one of the nation's toughest restrictions on abortion, a Texas law that women's groups said would have forced more than three-quarters of the state's clinics to close. Pete Marovich/Getty Supreme Court strikes down abortion restrictions Abortion rights activists cheer after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. Mandel Ngan/AFP/Getty Supreme Court strikes down abortion restrictions Abortion rights activists cheer after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. Mandel Ngan/AFP/Getty Supreme Court strikes down abortion restrictions WASHINGTON, DC - JUNE 27: Abortion rights activists Morgan Hopkins of Boston, left, and Alison Turkos of New York City, celebrate on the steps of the United States Supreme Court on June 27, 2016 in Washington, DC. In a 5-3 decision, the U.S. Supreme Court struck down one of the nation's toughest restrictions on abortion, a Texas law that women's groups said would have forced more than three-quarters of the state's clinics to close. Pete Marovich/Getty Supreme Court strikes down abortion restrictions Abortion rights activists cheer after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. Getty Supreme Court strikes down abortion restrictions WASHINGTON, DC - JUNE 27: Abortion rights activists Morgan Hopkins of Boston, left, and Alison Turkos of New York City, celebrate on the steps of the United States Supreme Court on June 27, 2016 in Washington, DC. In a 5-3 decision, the U.S. Supreme Court struck down one of the nation's toughest restrictions on abortion, a Texas law that women's groups said would have forced more than three-quarters of the state's clinics to close. (Photo by Pete Marovich/Getty Images) Getty Images Supreme Court strikes down abortion restrictions Abortion rights activist Morgan Hopkins of Boston, celebrates on the steps of the United States Supreme Court on June 27, 2016 in Washington, DC. In a 5-3 decision, the U.S. Supreme Court struck down one of the nation's toughest restrictions on abortion, a Texas law that women's groups said would have forced more than three-quarters of the state's clinics to close. Pete Marovich/Getty Supreme Court strikes down abortion restrictions Abortion rights activists embrace after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. AFP/Getty Images Supreme Court strikes down abortion restrictions Abortion rights activists hold placards outside of the US Supreme Court ahead of a ruling on abortion clinic restrictions on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. Mandel Ngan/AFP/Getty Supreme Court strikes down abortion restrictions In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. Mandel Ngan/AFP/Getty Supreme Court strikes down abortion restrictions Abortion rights activists cheer after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. AFP/Getty Images Supreme Court strikes down abortion restrictions Abortion rights activists cheer after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images) AFP/Getty Images Supreme Court strikes down abortion restrictions Abortion rights activists cheer after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images) AFP/Getty Images Supreme Court strikes down abortion restrictions Abortion rights activists embrace after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. AFP/Getty Images Supreme Court strikes down abortion restrictions Pro-choice activist, Alissa Manzoeillo, of Washington, D.C. waits for rulings in front of the U.S. Supreme Court on June 27, 2016 in Washington, DC. A ruling is expected in Whole Woman's Health v. Hellerstedt, a Texas case the places restrictions on abortion clinics, as well as rulings in the former Virginia Governor's corruption case and a gun rights case. Pete Marovich/Getty Supreme Court strikes down abortion restrictions Abortion rights activists cheer after the US Supreme Court struck down a Texas law placing restrictions on abortion clinics, outside of the Supreme Court on June 27, 2016 in Washington, DC. In a case with far-reaching implications for millions of women across the United States, the court ruled 5-3 to strike down measures which activists say have forced more than half of Texas's abortion clinics to close. Supreme Court strikes down abortion restrictions Abortion rights activists hold placards outside of the US Supreme Court ahead of an expected ruling on abortion clinic restrictions on June 27, 2016 in Washington, DC. AFP/Getty Images Supreme Court strikes down abortion restrictions Abortion rights activists hold placards outside of the US Supreme Court ahead of an expected ruling on abortion clinic restrictions on June 27, 2016 in Washington, DC. AFP/Getty Images

The gerrymandering has helped create a polarised political environment, some have said, in which Republicans and Democrats struggle to reach compromises on major policy issues such as healthcare and government spending.

As districts become less competitive, people elected to represent those areas in government move closer to their ideological bases and further away from the political centre, the Brookings Institution – a nonpartisan think tank – reported.

While the Supreme Court has never found a plan unconstitutional because of partisan gerrymandering, federal courts have previously ruled that maps that employ “racial gerrymandering” are against the law.

In racial gerrymandering, map lines are drawn to lower the influence of minority voters, who tend to vote in favour of the Democratic Party.

On Tuesday during oral arguments, the justices seemed to agree that voting maps drawn by politicians to give their party an advantage in elections are an unappealing feature of American democracy. However, the conservative justices voiced concern over whether the court could define a standard for determining when the practice was unconstitutional.