Boehner says in a statement that he'd like to go, but it's impossible with his duties including the budget debate and hosting the Irish prime minister at the Capitol.
Residents of Buenos Aires met the papal announcement with surprise, checking smartphones in the street and asking each other if the news was true.
Catholics praised the selection of Pope Francis, saying that his roots in the Southern Hemisphere could mean more attention to issues of poverty and underdevelopment.
Pope Francis is the first Latin American pope, a prospect that fills many in the region with hopes for better representation of their concerns at the Vatican.
The election of Francis is being interpreted as a victory for reform-minded cardinals, and may herald sweeping changes for the scandal-beset Catholic Church.
A Christian Science perspective.
The newly-elected Pope Jorge Mario Bergoglio proclaimed his new moniker as Francis I, a first for papal names. Let have a look at the history and popularity of pope names.
The first pope from Latin America has highlighted in recent years the region's yawning gap between rich and poor.
The selection of Jorge Bergoglio, a Jesuit from Argentina, to be the next head of the Catholic Church electrified Rome.
Cardinal Jorge Mario Bergoglio of Argentina - now Pope Francis - was not widely considered the top candidate heading into this week's conclave.