Democratic U.S. Sen. Bob Casey of Pennsylvania and Republican challenger David McCormick will meet for their first debate in a race for a swing-state Senate seat that could help determine control of the chamber in November’s election.

Dave McCormick, the Republican challenger trying to flip the U.S. Senate seat in swing-state Pennsylvania, said he’ll press for U.S. military action in Mexico to target fentanyl trafficking networks,

David McCormick, who is challenging third-term Democratic Sen. Bob Casey of Pennsylvania, said he'll press for U.S. military action in Mexico to target fentanyl trafficking networks

Bob Casey of Pennsylvania, is making the idea part of his plan for fighting the fentanyl scourge, which is playing a big role in the campaign and has been central to dueling TV ads in the race. The idea of using the military garnered attention in last year's GOP primaries before Trump emerged as his party's presidential nominee for the third consecutive time.