across the aisle

Referring to people who have different political beliefs or ideologies than oneself or someone else. Commonly used of members of different political parties. You'll never have the votes to pass this healthcare bill if you don't reach across the aisle. If reform of any kind is going to occur in this lifetime, it will take some strong-willed individuals willing to work across the aisle. The party in power just steamrolls things through anymore. No politicians seem interested in working across this aisle.