Is the agreement between President Trump and Mexico on border enforcement working to reduce illegal drugs entering the US?

According to Jonathan Lines, the effectiveness of the agreement remains to be seen, but there are positive indicators. Border Patrol, ICE, and Homeland Security are now able to focus on narcotics interdiction, with drug seizures increasing as a result of this renewed focus. However, Chinese fentanyl and vaping products continue to enter the country illegally, indicating ongoing challenges. Lines expresses hope that this diplomatic initiative with Mexico will ultimately have a meaningful impact on reducing drug trafficking across the border.