This depends on the country. Canada: Jean Chretien was the Prime Minister in 1997 UK: Tony Blair, after the general election, on the first of May 1997. Earlier in the same year, the Prime Minister was John Major.
John Prescott deals with British politics. He was a Deputy Prime Minister of the United Kingdom from 1997 to 2007. In the year 2007 he resigned from his post when Tony Blair resigned from the post of Prime Minister.