LIMA — On the campaign trail, Ollanta Humala vowed that as president he would protect rural communities from mining and oil companies that wanted to dig and drill on their lands. The leftist candidate even pushed for a recall of then President Alan Garcia, blaming him for enabling deadly clashes between police and protesters. But now that Humala is president, some of his onetime allies are accusing him of authoritarianism and betrayal as his government fights to keep a lid on a wave of angry anti-mining protests.