The visit was scheduled for February 1998 right at the height of special prosecutor Kenneth Starr's investigation into Bill Clinton, including his relationship with White House intern Monica Lewinsky. After assessing the situation, lawyer John McInespie wrote the following to Mr Blair's chief of staff:
"So far our people say that there is no 'smoking gun' to charge Clinton with anything, but that might not be the case by the time of the forthcoming visit of the prime minister. You remember that Al Capone was eventually convicted of tax evasion. It is no different in this case".
Downing Street dropped plans for UK First Lady Cherie Blair to attend a meeting on the White House intern scheme, but decided to go ahead with the prime minister's visit to the United States.
During a joint press conference Tony Blair praised Bill Clinton, describing him as "someone I am proud to call not just a colleague, but a friend".
Sir Christopher Meyer, then UK ambassador to the United States, wrote in a cable that "the tension shown by Clinton and his staff before the press conference was matched only by their relief afterwards". Sir Christopher added that officials from the Clinton administration were grateful for Blair's remarks.
"Your prime minister didn't have to say what he did at the press conference. We owe you big time", Jim Steinberg, the deputy national security adviser said as per the UK ambassador
Bill Clinton categorically denied the allegation.
"I want to say one thing to the American people. I want you to listen to me. I'm going to say this again: I did not have sexual relations with that woman, Miss Lewinsky. I never told anybody to lie, not a single time; never. These allegations are false", the Democrat said in a televised speech.
Yet, a subsequent investigation, which saw Lewinsky turn over her dress stained with Clinton's semen, proved that the president lied. Clinton went on to admit that he had engaged in an "improper physical relationship". He was subsequently impeached on charges of perjury and obstruction of justice, but was acquitted.