Walsh, a Tea Party Republican, says he believes Congress needs to make its position clear with legislation that would encourage Israel to annex the West Bank.
"My hope is that this will help buck up Israel," Walsh said. "We're not going to get peace until the other side realizes that they're dealing with strength, that Israel and the U.S. are not going to back down."
But even most pro-Israel lawmakers and pundits believe that step could blow up tenuous peace negotiations. Other bills before Congress would eliminate U.S. funding for the United Nations, or aid nations who voted in favor of Palestinian statehood.
For his part, Walsh believes that "there needs to be a consequence" for Palestine's push for U.N. recognition.
"I worry for Israel's security the day after [the vote]," Walsh said. "I worry about the world changing over there if the U.N. takes action."