Portland State (9-7, 3-3 Big Sky) used an 8-2 run to take a 76-64 lead with 3:14 left and made 6 of 6 free throws in the final 1:02 to seal the win.
Idaho (7-9, 2-3) erased most of an 11-point first half deficit to get within 53-51 on Sekou Wiggs layup with 13:22 left, but Portland State ran off five straight to start a 13-3 run, going ahead 66-54.
Mike Scott had nine of his 15 points for Idaho in the second half and nearly completed a triple-double with 10 assists and eight rebounds. Wiggs added 12 points and Bira Seck scored 10.
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