By Shailagh Murray and Paul Kane Washington Post Staff Writers Wednesday, July 18, 2007; Page A01 Democrats rolled out cots and ordered pizzas as they settled in for a marathon Senate debate on Iraq last night that featured numerous speeches but little chance of getting any closer to resolving the stalemate over how to end the war. By Shailagh Murray and Paul Kane Washington Post Staff Writers Wednesday, July 18, 2007; Page A01 Democrats rolled out cots and ordered pizzas as they settled...