In a surprising vote Thursday, the Senate voted 68-23 to pass a resolution from Majority Leader Mitch McConnell (R-KY) expressing opposition to President Trump's plan to withdraw US troops from Syria, and expressing opposition to any theoretical pullout from Afghanistan that might result from a negotiated deal to end that war. 

The non-binding resolution was passed with overwhelming support from the Republican majority, setting them squarely against parts of President Trump's foreign policy. A number of Democrats who voted against it expressed concern that it was tantamount to a vote advocating a state of permanent war.

Which it realistically is. The 2001 authorization for the Afghan War was built around 9/11 and the defeat of al-Qaeda. Neither are hugely relevant issues in 2019 Afghanistan, and a peace treaty being negotiated centers heavily around the Taliban promising to keep al-Qaeda and ISIS out of the country in the future.