Hillary Clinton and Bernie Sanders met in their first one-on-one debate where they clashed over Wall Street, foreign policy and what it means to be a progressive. Days before the New Hampshire primary, Sanders leads Clinton by 20 points in the Granite State. On the Republican side, Donald Trump’s second-place finish in Iowa has shaken up the race for the GOP nomination.

After seven years of debate, the Obama administration rejected the proposed Keystone XL pipeline. Obama said the project, which would extend from Canada to Texas, served "no national interest." The New York Times' Coral Davenport explains what's behind the decision. Also on Friday, the October jobs report was released showing over 270,000 jobs added and an unemployment rate down to 5%.

The GOP presidential candidates are looking for changes to the primary race debates, but can the campaigns agree on tweaks? Gwen Ifill sits down with Amy Walter of the Cook Political Report and Tamara Keith of NPR to discuss what’s at stake for different camps, why Jeb Bush is trying to reboot his campaign, plus Democratic candidate Bernie Sanders’ first TV ad.

The top 11 Republican presidential contenders assembled at the Ronald Reagan Presidential Library for the second debate on Wednesday night. Karen Tumulty of The Washington Post explains how a combination of attacks from challengers and specific policy discussion left frontrunner Donald Trump silent for part of the debate. Plus, Carly Fiorina's strong debate performance and Democratic concerns.

The State Department released another batch of Hillary Clinton’s emails and 150 were classified after the fact. After a meeting with RNC chairman Reince Priebus, Donald Trump signed an agreement pledging allegiance to the Republican party and seemingly forgoing a potential independent run. President Obama received the necessary votes to assure the Iran agreement survives GOP opposition

While the top ten Republicans debated in primetime, the seven other candidates tried to break out of the bottom tier in a forum dubbed by many the "happy hour debate." Who was able to take on the top ten and increase their standing heading into the next debate in September?

The first Republican presidential debate is less than a week away, and many are speculating about the role businessman Donald Trump will play as he leads the GOP field. Which Republicans will be on the stage to take on Trump? Plus, Congress is heading out of town for its five-week summer recess while leaving some major issues unresolved.

The new nuclear deal with Iran has managed to rile up some in the U.S. and abroad. With the disapproval of Israeli Prime Minister Benjamin Netanyahu and politicians alike, the new deal leaves questions in its wake. Reporters break down the deal's future implications. Plus, a report on the staggering political fundraising that will impact the race to 2016.

The Justice Department launched a hate crimes investigation into the mass shooting at a historic black church in Charleston, S.C., that left nine people dead. NPR's Carrie Johnson reports on President Obama's calls for a shift in how the U.S. thinks about gun violence. In Congress, GOP leaders worked with the White House to pass fast-trade trade authority after Democrats blocked the initial bill.

House Democrats led by Nancy Pelosi voted down President Obama's fast-track trade authority Friday. POLITICO's Manu Raju explains the showdown and the possible resolution next week. Also this week, President Obama announced that 450 more troops would be headed back to Iraq to advise and train the Iraqi military.