The rapid advance on Aleppo came just four days after a surprise opposition offensive that represents the most intense escalation in the civil war in years.
But over the years, the former congressman's views have often aligned with those of his potential boss, Robert F. Kennedy Jr., particularly on vaccine safety.
The ceasefire agreement between Israel and Hezbollah, which came into force this week, does not say when people will be able to return to the cities and villages of Lebanon's far south.
Robert F. Kennedy Jr. and other candidates for top healthcare posts are at odds with the pharmaceutical industry, setting the stage for tense battles over regulatory changes.
Dozens of people were killed after forces opposed to President Bashar al-Assad's government took control of a Syrian military base, a monitoring group said.
Several countries are investigating and European authorities say they have not ruled out sabotage. But US intelligence officials assessed that the cables were not deliberately cut.