• Dean Obeidallah of SiriusXM Insight 121 calls in at 9:30am ET / 6:30am PT to talk about the last days of Jon Stewart

• Charlie Pierce of Esquire’s Politics Blog calls in at 10:30am ET / 7:30am PT to preview tomorrow’s GOP debates

• Actor and comedian Carlos Alazraqui joins us in the Los Angeles Bureau at 11am ET / 8am PT for “Coffee With Carlos”

• Fox News has determined which Republican presidential candidates will participate in the GOP’s first primetime primary debate tomorrow. The candidates who made the cut include Donald Trump (with a polling average of 23.4 percent), Jeb Bush (12.0 percent), and John Kasich (3.2 percent).

• President Obama is casting a looming congressional vote on the Iran nuclear deal as the nation’s most consequential foreign policy debate since the authorization of the Iraq war, a now unpopular decision that still reverberates through American politics.

• Republican presidential candidate Jeb Bush, who has been criticized recently by some conservatives for serving on the board of a charity that gave money to Planned Parenthood, called for the organization’s defunding during an interview Tuesday with the leader of the Southern Baptist convention.