"How do you manage your clients who are completely unreasonable, rude, and treat you and your staff extremely poorly?" Go up the executive chain. Someone is pa

"How do you manage your clients who are completely unreasonable, rude, and treat you and your staff extremely poorly?" Go up the executive chain. Someone is paying handsomely for your project to end succesfully and that particular someone will probably not be very pleased when he hears that a project is being sabotaged (== $$$) by two asshole underlings. Use that to your advantage.