Uncommitted (voting option)

[7] Federal Democratic Party rules prohibit any state, except for Iowa, New Hampshire, Nevada and South Carolina from holding its primary before February 5, or Super Tuesday.

[11] On December 10, 2007, the Michigan Democratic Party issued a press release stating that the primary would be held on January 15, 2008.

The press release also urged supporters of Biden, Edwards, Obama and Richardson to vote "uncommitted" instead of writing in their preferred candidates' names.

[16] In Washington, the state's largest labor union, the United Food and Commercial Workers, endorsed uncommitted.

[17] In response, the advocacy group Democratic Majority for Israel ran ads arguing that voting "uncommitted" would weaken Biden and support Donald Trump.

[23] The uncommitted share exceeded that against Barack Obama in 2012, the most recent prior re-election campaign of a Democratic president (though in 2012 it was a caucus rather than a primary).