A full list of these candidates and their parties and filing dates can be found here.In order to get on the ballot, a candidate for president of the United States must meet a variety of complex, state-specific filing requirements and deadlines.Maine and Nebraska are yellow because their second congressional districts were battlegrounds.From July 2015 to September 2016, Ballotpedia's Daily Presidential News Briefing provided a curated account of the day's most important news in the 2016 presidential election. These regulations, known as ballot access laws, determine whether a candidate or party will appear on an election ballot. A presidential candidate must prepare to meet ballot access requirements well in advance of primaries, caucuses, and the general election.For more information, see Ballot access for presidential candidates.
The 2016 battleground states are highlighted on the map below in grey.
Those 21 electoral votes that separated Clinton and Trump might not sound all that significant, but they were.
Ballotpedia broke down all the different combinations of battleground states that could get Clinton and Trump to 270 electoral votes or higher.
Clinton, for example, began the general election with an almost guaranteed 200 electoral votes from 16 states and Washington, D. That's 74 percent of the 270 electoral votes needed to win.
Trump began with an almost guaranteed 179 electoral votes—66 percent of 270—from 22 states.