The Taoiseach met Florida Governor Jeb Bush at Government buildings today.
The meeting between Mr Ahern and Mr Bush is part of a series of trade meetings undertaken by the brother of the US president in the United Kingdom and Ireland.
This afternoon Mr Bush spoke at the Conrad Hotel as part of a private lunch of the American Chamber of Commerce.
Mr Bush's visit sparked criticism from the Irish Anti War Movement (IAWM), which staged a protest outside the hotel.
Outside the Conrad Hotel, up to 50 anti-war protestors waved peace banners and the Palestinian flag. The demo also protested against telecoms firm, Meteor, which sponsored the American Chamber of Commerce event.
According to the IAWM, Mr Bush should be left in "no doubt" about the depth of opposition in Ireland to his support for the war on Iraq and Afghanistan.
Dr Fintan Lane, a spokesmann for Anti-War Ireland, said: "He is a prominent neo-con and one of the architects of the aggressive and deeply conservative regime that now runs the United States."
"Bertie Ahern should have met Jeb Bush only if he intended to use the meeting as an opportunity to express Irish revulsion at US military actions in the Middle East," Dr Lane added.