The debate over the fiscal 2017 defense policy bill on Thursday will feature the classic clash between Democrats and Republicans on defense versus non-defense spending.

The Senate is expected to vote Thursday on moving forward with both an amendment from Sen. John McCain, R-Ariz., to boost defense spending by $18 billion as well as a second-order amendment from Sen. Jack Reed, D-R.I., that would replace McCain’s plan with one to increase non-defense spending by an equal amount.