Notable Quote of the Day

"The scariest real-world scenario is that on the eve of the election, a candidate is portrayed saying or doing something very embarrassing or illegal — or what-have-you — and there's no way to correct the record fast enough that voters would understand that this AI-driven false video is indeed not true."

– Paul Barrett, deputy director of NYU Stern Center for Business and Human Rights

Democrats

• Joe Biden, Amy Klobuchar, Tim Ryan, Bernie Sanders, Tom Steyer, Marianne Williamson, and Andrew Yang are attending a labor forum in Philadelphia on Tuesday.

• Michael Bennet released two ads in Iowa focused on his political experience and his healthcare proposal. He spent $190,000 on television and $250,000 on digital ads.

• Bill de Blasio will be in New York City Tuesday to honor a 9/11 first responder.

• Pete Buttigieg is presenting his disaster relief platform while campaigning in a South Carolina community affected by Hurricane Florence. His plan includes public-private partnerships for disaster response and increasing the number of qualified disaster workers.

• Julián Castro hosted a birthday celebration with his twin brother, Joaquin, in San Antonio.

• Kamala Harris appeared on The Tonight Show with Jimmy Fallon Monday night.

• Beto O'Rourke is campaigning in Los Angeles Tuesday.

• Joe Sestak will campaign in Chariton and Des Moines in Iowa Tuesday.

• The Working Families Party endorsed Elizabeth Warren Monday. The group had endorsed Sanders in the 2016 Democratic primary.

• Yang held a rally in Cambridge, Massachusetts, attended by 1,000 people.

Republicans

• Mark Sanford spoke in front of the State House in South Carolina Monday with a cardboard cutout of Trump to call for a debate.

• Donald Trump is expected to raise more than $15 million for the joint fundraising committee Trump Victory during a California fundraising trip on Tuesday and Wednesday. 

• Joe Walsh said he would campaign in Arizona, Kansas, Nevada, and South Carolina, where Republican primary events have been canceled, to encourage voters there to demand primaries be held.

• Bill Weld spoke at the Boston Public Library Monday.

Flashback: September 17, 2015

CNN announced it had received its highest ratings ever from the previous night’s Republican primary debate, bringing in 22.9 million viewers.