FLAGSTAFF, Ariz. (AP) — Native American voting rights advocates are cautioning against states moving to mail-in ballots without opportunities for tribal members to vote safely in person. In a wide-ranging report released Thursday, the Native American Rights Fund outlined the challenges that could arise: online registration hampered by spotty or no internet service, ballots delivered to rarely-checked Post Office boxes and turnout curbed by a general reluctance to vote by mail. “We’re all for increased vote by mail,” said Jacqueline De Leon, a staff attorney with the group and a member of Isleta Pueblo in New Mexico.