Senators on Sunday released a highly anticipated $118 billion package that pairs border enforcement policy with wartime aid for Ukraine, Israel and other U.S. allies, setting off a long-shot effort to push the bill through heavy skepticism from Republicans, including House Speaker Mike Johnson.

The proposal is the best chance for President Joe Biden to resupply Ukraine with wartime aid — a major foreign policy goal that is shared with both the Senate’s top Democrat, Sen. Chuck Schumer, and top Republican, Sen. Mitch McConnell. The Senate was expected this week to hold a key test vote on the legislation, but it faces a wall of opposition from conservatives.

With Congress stalled on approving $60 billion in Ukraine aid, the U.S. has halted shipments of ammunition and missiles to Kyiv, leaving Ukrainian soldiers outgunned as they try to beat back Russia’s invasion.

The new bill would also invest in U.S. defense manufacturing, send $14 billion in military aid to Israel, steer nearly $5 billion to allies in the Asia-Pacific, and provide humanitarian assistance to civilians caught in conflicts in Ukraine and Gaza.