WASHINGTON (AP) — The guessing game is over -- and the launch date of the Hillary Rodham Clinton presidential campaign is known.

According to people familiar with her plans, Clinton will make the announcement Sunday with an online video posted on social media. She will then make stops in some key early voting states, including Iowa and New Hampshire, where she'll hold small events with voters.

It's Clinton's second presidential bid. She appears unlikely to face a stiff primary opponent, though a handful of lower-profile Democrats have said they are considering their own campaig