Hardly had he left Peru to check this movement when an uprising at Lima deposed his representative and led to the summons of a Congress which, in June, 1827, restored the former constitution and chose a new President.

In Quito, also, the government of the unstable dictator was overthrown.
Alarmed by symptoms of disaffection which also appeared in the western part of the republic, Bolivar hurried to Bogota.

There in the hope of removing the growing antagonism, he offered his "irrevocable" resignation, as he had done on more than one occasion before.

Though the malcontents declined to accept his withdrawal from office, they insisted upon his calling a constitutional convention.

Meeting at Ocana, in April, 1828, that body proceeded to abolish the life tenure of the presidency, to limit the powers of the executive, and to increase those of the legislature.