After 50 years of internal war, Colombia finally seems to be approaching a peace accord with leftist guerillas. But the US Senate is considering legislation that could throw a big obstacle on Colombia's path to peace. The Transnational Drug Trafficking Act, sponsored by Chuck Grassley (R-IA) and Dianne Feinstein (D-CA), aims to target every link in the chain of narco-trafficking—right down the impoverished peasants who grow the coca. The bill has unanimously passed the Senate twice before, but has never cleared the House. On Oct. 7, it passed the Senate a third time, and a big push is on to make it law of the land. "Since drug cartels are continually evolving, this legislation ensures that our criminal laws keep pace," said Grassley, who chairs the Senate Judiciary Committee and the Caucus on International Narcotics Control.