Benjamin Netanyahu, prime minister of Israel, warned Congress of the dangers of making a bad nuclear deal that could pave “Iran's path to the bomb.” What would a good deal achieve? And is Netanyahu right about the threat of Iran? Gwen Ifill gets two views from former National Security Advisor Stephen Hadley and former State Department official Vali Nasr.

On the Webcast Extra, Dan Balz of the Washington Post and Jeff Zeleny of ABC News report on Hillary Clinton's impending 2016 presidential campaign. When will she officially jump in? And what is she waiting for?

President Obama's State of the Union was met with pushback from the Republican-controlled Congress, but where is there room for compromise on the president's 2015 legislative agenda? Alexis Simendinger and Ed O'Keefe report on the president's proposals for community college and trade as well as the Republican opposition.

Reverberations from the terror attack in Paris continued this week as dozens of arrests have been made, and Europe remains on heightened alert. Plus, nuclear talks with Iran continue, and President Obama is threatening to veto legislation imposing more sanctions on Iran saying they would derail progress. The Supreme Court will decide the constitutionality of same-sex marriage.

On the Webcast Extra, Supreme Court justices heard arguments in cases about the limits of free speech on Facebook and pregnancy discrimination in the workplace. While the 2016 campaign for president hasn't officially begun, potential candidates are maneuvering behind the scenes for fundraisers and web-gurus. And in the fight against ISIS, Iran has begun air strikes against the terrorist group.

As the GOP candidates debate economics, President Obama promotes his jobs plan. But with its defeat in the Senate, what's next? Also, the strange story of an assassination plot against a Saudi Ambassador involving Iran and a Mexican drug cartel. Joining Gwen: Karen Tumulty, Washington Post; Michael Duffy, TIME; Alexis Simendinger, RealClearPolitics; James Kitfield, National Journal.

This week, we look back at 2011 and forward to 2012. We'll analyze battles between Congress and the President, the economy, the killing of Osama bin Laden, the pullout of US troops in Iraq while fighting continues in Afghanistan, and more. Joining Gwen: Helene Cooper, New York Times; Michael Duffy, Time Magazine; Doyle McManus, Los Angeles Times; David Wessel, Wall Street Journal.

As the GOP presidential primary race between Rick Santorum and Mitt Romney tightens, the panel previews the Arizona and Michigan primaries. Plus, President Barack Obama's proposed budget, a deal to extend payroll tax cuts, and tensions over Iran's nuclear program. Joining Gwen: Karen Tumulty, Washington Post; Jackie Calmes, New York Times; Susan Davis, USA Today; Martha Raddatz, ABC News.

The U.S. and Iran have finally settled on the details of an interim nuclear deal, with talks for a final agreement slated for February. Gwen Ifill talks to chief foreign correspondent Margaret Warner about diplomatic relations going forward with Iran, including the Syrian peace efforts and pressure on Capitol Hill for sanctions.

New York Times columnist David Brooks and Washington Post columnist Ruth Marcus join Gwen Ifill to discuss the week's top political news, including whether or not President Obama went far enough with his recommended surveillance reforms, who's blame for the Benghazi attack and the possibility for new sanctions on Iran.