The obvious candidates are the economy and national security.Democrats will attack Mr Bush as the first president since Herbert Hoover to preside over net job losses.
The reason is that most governments fear that it would be much worse to delay than to go ahead.Britain's position in all this will be the more awkward since it is to take the EU presidency on January 1st 1998 and will therefore preside over next spring's decisions on who is to join the euro.
The day before the vote on the presidency, Michel Zen-Ruffinen, FIFA's general secretary, refused to preside over the meeting and claimed that he had been prevented for months from seeing important documents.
But already electioneering is in the air and suddenly it looks as if Néstor Kirchner, the incumbent president, may face a strong challenger.Mr Kirchner has been fortunate enough to preside over a robust recovery from financial collapse in 2001-02.
Cameron will say: "Professionals who fail to protect children will be held properly accountable and council bosses who preside over such catastrophic failure will not see rewards for that failure".
Putin will preside over a celebration of the Soviet victory over Nazi Germany in Moscow on 9 May, although western leaders are snubbing the event amid tensions related to Russia's role in the Ukraine crisis.
Francis will also host a meeting with Muslim, Orthodox and Jewish leaders, and preside over a rally for young people before returning to Rome in the evening.
This February, Xi travelled to Hollywood in person to preside over agreements on closer co-operation between the American and Chinese film industries.
Those measures have made leaders such as Bolivia's Evo Morales and Ecuador's Rafael Correa extremely popular at the polls, allowing them to preside over long periods of political stability and economic growth.
Duncan Smith took this as a sign that the prime minister wanted to preside over a broad church.
In an unexpected twist, Texas senator Ted Cruz and Florida senator Marco Rubio – also GOP presidential candidates and among Paul's main rivals – were both scheduled to preside over the Senate floor on Wednesday night and thus wound up in midst of the action.
