TIME Magazine detailed Donald Trump's campaign troubles this week with a cover story called simply "Meltdown." Washington Bureau Chief Michael Scherer explains the choice. Plus, with a little more than a month before the presidential debates begin, Donald Trump has yet to say whether he'll participate. His concerns include potential moderators.

Gwen Ifill and the panel talk to voters of the Badger State less than 24 hours after the PBS Newshour Democratic Presidential Debate between HIllary Clinton and Sen. Bernie Sanders. Voters asked the panel about the tone of the 2016 campaign, a lack of substance from the candidates and a potential Bernie Sanders-Donald Trump-Michael Bloomberg match-up in the general election.

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.

Islamic State forces made significant gains in Iraq and Syria this wee. With ISIS controlling half of Syria, Yochi Dreazen of Foreign Policy reports on the U.S. efforts to fight back. Back home, Congress prepares to leave town for Memorial Day while continuing fights on contentious bills including fast-track trade authority and reauthorization of NSA data collection. Plus the 2016 race heats up.

In a key vote Thursday, the Senate advanced legislation that would strengthen the administration's hand in global trade. The president said the action to move toward a final vote was a big step forward. Political editor Lisa Desjardins joins Gwen Ifill to talk about that vote and the Patriot Act reauthorization bill.

Senate leaders compromised on a deal to fast-track President Barack Obama’s trade initiative after Senate Democrats rejected the president’s original proposal. Manu Raju of POLITICO explains how the compromise came together.

Supporters of the Trans-Pacific Partnership say the deal would bring greater prosperity by opening trade, but opponents say it fails to include labor protections and could cost jobs. In the first in a series of conversations about what’s at stake, Gwen Ifill talks to Richard Trumka of the AFL-CIO about why he opposes the trade deal.