<P> Members of the Catholic Church have been active in the elections of the United States since the mid 19th century . Indeed, the Irish came to dominate the Democratic Party in many cities . The U.S. has never had religious parties (unlike much of the world). There has never been an American Catholic religious party, either local, state or national . </P> <P> In 1776 Catholics comprised less than 1% of the population of the new nation, but their presence grew rapidly after 1840 with immigration from Germany, Ireland, and later from Italy, Poland and elsewhere in Catholic Europe from 1840 to 1914, and also from Latin America in the 20th and 21st centuries . Catholics now comprise 25% to 27% of the national vote, with over 68 million members today . 85% of today's Catholics report their faith to be "somewhat" to "very important" to them . From the mid-19th century down to 1964 Catholics were solidly Democratic, sometimes at the 80--90% level . From the 1930s to the 1950s Catholics formed a core part of the New Deal Coalition, with overlapping memberships in the church, labor unions, big city machines, and the working class, all of which promoted liberal policy positions in domestic affairs and anti-communism during the Cold War . Since the election of a Catholic President in 1960, Catholics have split about 50--50 between the two major parties in national elections . With the decline of unions and big city machines, and with upward mobility into the middle classes, Catholics have drifted away from liberalism and toward conservatism on economic issues (such as taxes). Since the end of the Cold War, their strong anti-Communism has faded in importance . On social issues the Catholic Church takes strong positions against abortion and same - sex marriage and has formed coalitions with Protestant evangelicals . In 2015 Pope Francis declared that man - made climate change is caused by burning fossil fuels . The Pope stated the warming of the planet is rooted in a throwaway culture and the developed world's indifference to the destruction of the planet as it pursues short - term economic gains . However, the Pope's statements on climate change were generally met with indifference among Catholics while Catholic commentaries ranged from praise to dismissal, with some stating that it was not binding or magisterial due to its scientific nature . The Pope's statements on these issues were most prominently laid out in encyclical Laudato si' . The publication by Francis had put pressure on Catholics seeking the Republican Party nomination for president of the United States in 2016, including Jeb Bush and Rick Santorum, who "have questioned or denied the established science of human - caused climate change, and have harshly criticized policies designed to tax or regulate the burning of fossil fuels ." </P> <P> Religious tensions were major issues in the presidential elections of 1928 when the Democrats nominated Al Smith, a Catholic who was defeated, and in 1960 when the Democrats nominated John F. Kennedy, a Catholic who was elected . For the next three elections, a Catholic would be nominated for the vice presidency by one of the two major parties (Bill Miller in 1964, Ed Muskie in 1968, Tom Eagleton and then Sarge Shriver in 1972), but the ticket would lose . Geraldine Ferraro would continue the tradition in 1984, until it was broken in 2008 . A Catholic, John Kerry, lost the 2004 election to incumbent George W. Bush, a Methodist, who may have won the Catholic vote . 2012 was the first election where both major party vice presidential candidates were Catholic, Joe Biden and Paul Ryan . </P> <P> Currently there are 25 Catholics in the United States Senate, 16 Democrats, 9 Republicans, and 134 (out of 435) Catholics in the United States House of Representatives, including the current House Speaker Paul Ryan . In 2008, Joe Biden became the first Catholic to be elected Vice President of the United States . </P>

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