Elections to the United States House of Representatives were held in 1872 and 1873 for representatives to the 43rd Congress, coinciding with the re-election of President Ulysses S. Grant. Grant's Republican Party increased its majority greatly at the expense of the opposition Democratic Party. The pro-industry outlook of the Republicans appealed to many Northern voters, especially as the post-war economy exploded, and this allowed the party to flourish as the Industrial Revolution grew more widespread. The Republicans also benefited from a continuing association with Civil War victory as well as disarray amongst Democratic leadership.