Six ministers tied to Shiite cleric Muqtada al-Sadr left the Iraqi Cabinet Monday, protesting Prime Minister Nouri al-Maliki's refusal to set a timetable for U.S. withdrawal from Iraq. Two regional experts discuss the resignations and the impact on Iraqi politics.

The Senate showed slim support for nonbinding wording setting a target date of next March to remove troops from Iraq. A Republican attempt to scuttle the measure failed Tuesday in a 50-48 vote, mostly along party lines. The NewsHour presents…