Democrat Bob Casey and Republican David McCormick are facing off in a race that could decide which party controls the U.S. Senate.

Democrat Casey says the greed of “big conglomerates” is to blame for high prices for household essentials. Republican McCormick claims the economy is “weak.”

The heated Senate race in battleground Pennsylvania has tightened even further between Sen. Bob Casey (D-PA) and Republican challenger David McCormick as voters already start to cast their ballots. The neck-and-neck contest is one of several that could be the Senate majority-maker by determining whether Democrats hold on to the chamber with a razor-thin margin.