BISMARCK, N.D. (AP) — A federal judge is expected to decide in the coming weeks whether the new boundaries of North Dakota’s legislative districts dilute Native American voters’ strength on two reservations whose tribes are challenging the map approved by the Republican-controlled Legislature.

The bench trial in the case began Monday in Fargo; it ended Thursday. North Dakota District Chief Judge Peter Welte has taken the matter under advisement, with a June 30 deadline for the two sides to submit proposed findings.