Facebook says it blocks four networks of social media accounts to prevent election interference; and Julián Castro announces he might not have enough cash on hand to keep the campaign going.

2016 candidate Hillary Clinton says Russia is "grooming" Rep. Tulsi Gabbard for a third-party run. And Sen. Bernie Sanders has biggest Democratic campaign event this season so far.

While controversy swirls at the White House, the Chicago Teachers Union goes on strike, and retired admiral Joe Sestak walks 105 miles across New Hampshire.

Reps. Alexandria Ocasio-Cortez and Ilhan Omar, two members of the Squad, endorsed Sen. Bernie Sanders. Plus, some candidates are spending more than they're raising.

12 candidates took the stage last night in Ohio for the fourth Democratic debate, covering issues from health care to the Turkish invasion of Syria, and Sen. Elizabeth Warren replaced former VP Joe Biden as the centerstage target.

Tonight, twelve candidates will take the fourth Democratic debate stage in Westerville, Ohio. Rep. Tulsi Gabbard will be there, despite considering a boycott of the event.

Today is what some call Columbus Day, and others call Indigenous Peoples Day. Plus, over the weekend, United Food and Commercial Workers hosted a presidential forum in Altoona, Iowa.

Nine candidates addressed LGBTQ issues last night, including Mayor Pete Buttigieg, the first openly gay top-tier presidential primary candidate.

Tonight's LGBTQ forum comes at a time where LGBTQ workplace discrimination protections are at risk. And, former VP Joe Biden calls for President Trump's impeachment for the first time.