Sources: AP
Voters in the American state of Kentucky go to the polls for a Democratic Party primary with Hillary Clinton and Bernie Sanders winning an equal number of delegates and Clinton winning the popular vote narrowly. 2016-05-17
Hillary Clinton is forecast to win the Democratic Party primary in Maryland, Pennsylvania, Connecticut and Delaware while Bernie Sanders wins Rhode Island. With her victory, Clinton came close to securing the number of delegates she needs to win the nomination. 2016-04-26
Hillary Clinton gains a decisive win (57.6 percent to 42.4 percent) over Bernie Sanders in the Democratic Party primary. 2016-04-19
Registered Democratic voters in the U.S. state of Wyoming gather, by county, for the Wyoming Democratic caucuses. Bernie Sanders is projected to win. 2016-04-9
Voters in the U.S. state of Wisconsin go to the polls for a primary election with Ted Cruz winning the Republican Party contest and Bernie Sanders winning the Democratic Party primary. 2016-04-5
Bernie Sanders concedes the Missouri primary to Hillary Clinton, who led by 1,531 votes, 0.2 percent of those counted. Sanders says he will not ask for a recount, an option he had because the result is under the state's requirement, 0.5 percent — one-half of one percent. The Republican contest is too close to call as Donald Trump leads Ted Cruz by a similar 0.2 percent. 2016-03-17
Tulsi Gabbard resigns as vice-chair of the Democratic National Committee and endorses Vermont Senator Bernie Sanders. 2016-02-28
Voters in the American state of Nevada take part in Democratic Party caucuses, with Hillary Clinton winning against Bernie Sanders. 2016-02-20
The Democratic National Committee suspends Vermont Senator Bernie Sanders' presidential campaign's access to its national voter database after a member of his campaign staff took advantage of a software error to review Hillary Clinton's private campaign data. In response, the campaign files a lawsuit. 2015-12-18
Nominally independent Senator Bernie Sanders from Vermont announces that he will be seeking the Democratic Party nomination in the US presidential election. 2015-04-29