After seeing his poll lead whittled away by Labour over the first 2 weeks of the campaign, Dave is now fighting on two fronts as the Lib Dems threaten to move into the lead, with the Tories now polling at 33% on YouGov - no better than their 2005 result. And given the bias in the electoral system it would have to be a very freaky set of electoral results to give the Tories an overall majority on May 6th with 33% of the vote.
So what does Dave do? He tries to scare the electorate. This on the PA feed: "Tory warning over hung parliament". Quoting:
Mr Cameron said Britain was in desperate need of action to remove the "black cloud" of the deficit and clean up politics.
"Is another five years of Gordon Brown going to get that job done? He's had 13 years and he is making things worse," Mr Cameron said.
"Is a hung parliament going to get that job done? A hung parliament would be a bunch of politicians haggling, not deciding.
"They would be fighting for their own interests, not fighting for your interests. They would not be making long-term decisions for the country's future, they would be making short-term decisions for their own future.
"The way we are going to get things done is to have a decisive Conservative government."
Even by Dave's lowly standards this is the cheapest of punk BS. Fact: we have a dysfunctional electoral system. (How else do you explain the idea that Labour could get most seats on 28%, barely above its 1983 polling level?
Fact: only the Lib Dems (and the Greens) are offering an STV system that would sort this out. (Labour's proposed AV system is NOT proportional representation).
So this means we need a coalition involving the Lib Dems - or even, a Lib Dem majority govt (possible if they can get to 40% or so of the vote) - to sort out a system that is so obviously broken that it's hard to look at the seat projections and do anything except laugh.
What we DON'T need to do is to vote in the Tories, who are the only major party proposing to keep this daft system exactly as it stands.
What's really happening is that Dave knows he's been rumbled. Even if he emerges as the largest party (unlikely on the most recent polls) a Lib Dem - Labour coalition could still reach 325 seats if the Lib Dems do well enough.
If this all works out I'm gonna design a special lapel badge for Nick Clegg as The Guy Who Sorted Out British Politics. Many unresolved questions, of course. Will Gordon Brown really agree to a coalition involving legislation to introduce proportional representation? It seems difficult to believe.
But then, 2 days ago the Lib Dems at 30% was difficult to believe.