Joseph Simon Donnelly Sr. (born September 29, 1955) is an American attorney and politician serving as the senior United States Senator from Indiana. A member of the Democratic Party, he was elected to the Senate in 2012.
Born in Massapequa, New York, Donnelly graduated from the University of Notre Dame. He began his career on the Indiana State Election Board before working as an attorney in practice. From 1997 to 2001 he was on the Mishawaka Marian School Board, serving as its president from 2000 to 2001. In 2004, he won the Democratic nomination for a seat in the U.S. House of Representatives, losing to Republican incumbent Chris Chocola in the general election. In 2006 he challenged Chocola again, and won election with 54% of the vote. He represented Indiana's 2nd congressional district from 2007 to 2013, winning reelection in 2008 and 2010.
In May 2011, Donnelly announced his intention to run for the U.S. Senate, winning the Democratic nomination one year later in an uncontested primary. He then faced Indiana State Treasurer Richard Mourdock who had defeated 36-year incumbent Richard Lugar in the Republican primary. On November 6, 2012, Donnelly defeated Mourdock in the general election with 50% of the vote to Mourdock's 44%. In November 2018, Donnelly was defeated by Republican businessman Mike Braun. Wikipedia