(AP) — Six U.S. states want to intervene in Hawaii’s lawsuit challenging President Donald Trump’s travel ban.

The states of California, Maryland, Massachusetts, New York, Oregon and Washington filed a motion Monday asking to be parties in Hawaii’s lawsuit. They agree with Hawaii that the ban is unconstitutional.

Hawaii is challenging Trump’s proclamation issued last month targeting about 150 million potential travelers from Chad, Iran, Libya, North Korea, Somalia, Syria and Yemen, along with some Venezuelan government officials and their families.