But in his inaugural speech at a ceremonial palace in the old city centre, Mr Pena Nieto said the state had "lost ground" since his party left power.

BBC: Mexico's Enrique Pena Nieto inaugurated as president

Congressman Olvera admits that after 12 years outside the presidential palace of Los Pinos, there is much expectation within the party about Enrique Pena Nieto.

BBC: Mexico's Enrique Pena Nieto faces tough start

Kennedy spoke in 1962 at the National Palace, which also was the setting for a joint news conference Thursday with Obama and Pena Nieto.

NPR: Migrants To Obama: Don't Deport Mama