article_snippet.sent: It prompted David Cameron and Boris Johnson to join forces to warn of a looming 'constitutional crisis'.
article_snippet.sent: David Cameron and Boris Johnson questioned the legitimacy of the SNP's plan to try to put Mr Miliband in Downing Street, even if Labour wins fewer seats at the Election.
article_snippet.sent: Vote Conservative to stop Labour's budget.'
article_snippet.sent: David Cameron, in David Cameron first joint interview with the London Mayor, David Cameron chief rival to the Tory leadership, said: 'In the last 48 hours the SNP have said 'no money spent on defence projects unless you get rid of Trident'. '
article_snippet.sent: The stakes at this election's about sticking with a plan that's working or risking it with Mr Miliband.
article_snippet.sent: But frankly The stakes at this election have got much higher because of what's happening in Scotland with the SNP potentially wiping out Labour. '
article_snippet.sent: The way to avoid that outcome which would be unstable, bad for the economy, bad for jobs, bad for living standards, bad for this country's prospects, the way to avoid it is to vote Conservative.'
article_snippet.sent: The London Mayor, deployed to inject more passion into the Tory campaign, claimed it would mean 'truckfuls of taxpayers' dosh growling up the M1 to Scotland'. '
article_snippet.sent: Lots of people ... people who might even have voted Labour ... will think that this is a constitutional crisis,' this is a constitutional crisis added.
article_snippet.sent: Mr Johnson, who is seeking to return to the Commons in the West London seat of Uxbridge and South Ruislip, also said a Labour government dependent on the SNP's support would be 'totally shambolic'.
article_snippet.sent: Mr Miliband also accused Mr Cameron of 'trying to stir up English hatred against the Scots' by highlighting the threat posed by the SNP's Left-wing agenda.
article_snippet.sent: Last night, Labour deployed former prime minister Gordon Brown, who claimed the only way Mr Cameron can win the election 'is to build resentment in Scotland of the English and resentment in England of the Scots'.
article_snippet.sent: However, Mr Cameron also warned that an SNP surge could lead to 'months of constitutional chaos'.