1. World News: The ceasefire in Syria's civil war was violated after being in effect for less than one hour.The ceasefire went into effect on Monday night, but there were reports of violations in both northern and southern Syria, according to The New York Times. (The New York Times)
2. Talking Points: Donald Trump suggested that presidential debates shouldn't have moderators."The fact is that they're gaming the system. I think that maybe we should just have no moderator," Trump said in a CNBC interview on Monday. "Let Hillary and I sit there and just debate." (CNN)
3. Major News: Former U.K. Prime Minister David Cameron resigned as a member of Parliament.His resignation will trigger a by-election in his constituency of Witney, Oxfordshire, where he has been an MP since 2001. (Read More)
4. On The Trail: Hillary Clinton canceled a two-day visit to California after being diagnosed with pneumonia.
Following Hillary Clinton's pneumonia diagnosis, a campaign official told The Independent that she had canceled a planned two-day visit to California. Clinton had been scheduled to campaign in San Francisco and Los Angeles, as well as give a speech on economic policy. (Read More)