The United States certainly has the power to stop this. If you block all arms deals, trade, diplomatic relationships and immigration, Israel will be fighting a 4 front war with no foreign support and the country will crumble. This comes at very little cost to the US and incredible benefit to the world. However, I doubt that even a De la Cruz victory would stop the genocide. The Senate would block any sanctions on the Zionist entity and if that failed, the courts would also block it. The United States is genocidal to its core and there is no way that any individual or party could make the current state apparatus work for the benefit of humanity.