Iowa Attorney General Tom Miller, a supporter of clean energy policies reducing greenhouse gases as a way to battle global climate change, said Wednesday he was blocked by Republican Gov. Kim Reynolds from joining 21 other states in suing the Trump administration over a policy that relaxes restrictions on coal-fired power plants, the Associated Press reported. Miller had agreed to check with Reynolds before joining out-of-state lawsuits in return for Reynolds vetoing legislation that would have taken away his power to join the litigation. Reynolds said she supports the Trump administration’s rollback of some air quality regulations.