Last week Trump compelled the Department of Interior, led by Secretary Ryan Zinke, to review the designations of dozens of national monuments under the Antiquities Act. The order is supposed to be carried out in three months, culminating with a full report from Zinke. No one knows quite what to expect — which exact monuments they’re “reviewing,” whether the administration will attempt to rescind these designations (a legally dubious proposition), or whether they’ll try to downsize them. The latter isn’t unheard of, but it is uncommon. We talked to Aaron Weiss of the Center for Western Priorities and Kate Kelly of the Center for American Progress about which national monuments could be on the chopping block — from the obvious to the relatively unknown — and why the administration might have their sights on them.