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The Morning After: Read what the European press is saying about the Treaty rejection.
French President Nicolas Sarkozy has said that EU member states must continue ratifying the Lisbon Treaty to avoid a crisis, following Ireland's rejection of the text.
Mr Sarkozy said Ireland's rejection of the Treaty created 'an additional difficulty', but stressed that ratification must continue.
'The others must continue ratification... so that the Irish incident does not become a crisis,' Mr Sarkozy said at a joint news conference with US President George W Bush.
'Many Europeans do not understand the way in which we are now building Europe,' he said. 'We have to take this into account, very quickly, and change our way of building Europe.'
'We do not have the right to sabotage the European project, but we must do it differently,' he asserted.
He added that the result will not simplify the task of the French presidency, which begins on 1 July.
Today, Mr Sarkozy listed immigration and high fuel prices as priorities of the French presidency, and said the Irish No was a 'call to do more, better, differently' for Europe.
The Treaty, aimed at reforming the European Union, was defeated on Thursday by a margin of 110,000 votes.
France's European Affairs minister, Jean-Pierre Jouyet, said there is 'no other solution' than for Ireland to hold a second referendum on the treaty but that the vote should not be rushed.
He told Europe 1 Radio: 'The ratification process must be completed. And during this period, the Irish will have time to think and see whether, with a few mediations or a request from their part, they can revote.'
The Minister of State with responsibility for Integration, Conor Lenihan, earlier said it is unlikely that the Lisbon Treaty will be put to a referendum in Ireland again.
However, he said he could not rule out the possibility.
Last night, the Taoiseach said the Government accepts and respects the verdict of the Irish people, but he declined to absolutely rule out another referendum on the Treaty.
Speaking on RTÉ Radio's Morning Ireland this morning, Minister Lenihan said the risk of putting the Treaty to the Irish people for a second time could create even more damage.
Later, speaking to Eamon Dunphy, Libertas leader Declan Ganley, who campaigned for a No vote, said he was horrified that the possibility of another referendum was even being raised.
A leading think tank has suggested that the Lisbon Treaty could still come into force within the European Union, despite Ireland's rejection of it.
Speaking on RTÉ Radio, Director of the Centre for European Policy Studies, Daniel Gros, said he believed that the 26 other member states could ratify the Treaty without Ireland's involvement.
Yesterday, President of the European Commission, José Manuel Barroso, insisted that the Treaty was still 'alive' and urged all countries to continue the ratification process. 18 member states have already done so.
Slovenia, which currently holds the six-month rotating EU presidency, said the Treaty remained a key building block to make Europe 'more efficient, more democratic and transparent'.
But it said Ireland had 'put the brakes on' EU development and warned the bloc's competitiveness was at risk.
Victorious No campaigners have urged Mr Cowen to go back to the drawing board to negotiate a better deal. The Taoiseach will be meeting his colleagues at a European summit in Brussels next week.
What to do next is likely to dominate that meeting.