Francis also said he had not tried coca leaves to deal with the high altitude in Bolivia and admitted that being asked to pose for selfies makes him feel "like a great-grandfather."
Francis Chronicles: "We cannot force anyone to receive us, to welcome us; this is itself part of our poverty and freedom."
Bishops in Paraguay had wanted the pope to meet with small farmers and indigenous people who have been forced off their land.
In Paraguay, Francis told invited dignitaries at a concert that trading votes for favors is "something that happens in every country" and is a form of corruption.
Peace Pulpit: We have been anointed to carry out the work of Jesus, the work of the ruler guiding and showing others the way.
Pope's quotes: Some of our favorite quotes from Pope Francis.
We say: The church has made progress in addressing the sexual abuse scandal, but none of it happened voluntarily. All of it was forced by public pressure.
The Eucharist calls people to give all they are and have to God, seek his blessing and then take his love to the world, Pope Francis said in Bolivia.
On the back wall of the stone cottage behind the Bolduc House in Ste. Genevieve, Mo., the Doctrine of Discovery is posted. It was published on May 4, 1493, as the Inter Caetera Papal Bull by Pope Alexander VI. There is a petition to Pope Francis to rescind it on the Romero Institute's website.
Pope Francis' address to a joint meeting of Congress Sept. 24 will be broadcast live to members of the public on the West Front of the Capitol, House Speaker John Boehner announced Wednesday.
"The visit of Pope Francis to the U.S. Capitol is a historic moment for the country," he said in a statement, adding that "the unprecedented nature of his visit" prompted the decision to broadcast his address.