article_snippet: But while Cameron and the opposition Labour leader Ed Miliband have hired former White House election advisers to edge Cameron and Miliband in to the lead, no one can agree on what form a debate should take, how many there should be, or even who should be invited.
article_snippet: Cameron has insisted on just one debate involving the leaders of seven leading UK parties -- giving equal airtime to the Greens, the Scottish Nationalists and the upstart rightwing UK Independence Party (UKIP), among others.
article_snippet: But the Scottish National Party is holding out for at least one head-to-head debate with Cameron.
article_snippet: No one seems to be budging but both of the UK's largest parties could use the bump in the polls such a debate might bring.