bipartisan
adj.involving or supported by two opposing political parties. You use this word when people from different sides work together instead of fighting.
adj.characterized by cooperation or agreement between two major political parties, especially in a two-party system. Typically used attributively before nouns like 'support' or 'bill'.
“The new law has bipartisan support.”
“The senator sought a bipartisan solution to the budget crisis.”
“Rarely seen in modern polarized politics, the committee produced a bipartisan report that acknowledged the validity of both conservative and liberal economic arguments.”
“The newspaper described it as a high-profile meeting with the hope of sparking bipartisan “common ground.” The meeting reportedly touched on issues ranging from housing and immigration to the cost-of-living crisis.”
“One Democratic senator, Ruben Gallego, has also called on the Navy to allow a bipartisan delegation to visit the ship to assess the state of affairs.”
From bi- + partisan.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.