The Coalition has signally failed to tackle our national debt (which has risen massively since 2010, with only a one-third reduction in the deficit) and has completely lost control of our borders, completing the job started by Tony Blair in the 1990s.
Agreed. To be fair to the government (why not, just for once!), the first of those was never on the cards so quickly, and unlike deficit elimination, which Osborne promised and failed to achieve within the 2010-15 parliament, it was never promised.
The second of them is a genuine failure, however, and it's something which in due course I think history will hold against Cameron. He has through his own naivety and incompetence, and weakness in the face of his eurosceptic backbenchers, found himself in a hole and then kept digging!
It goes back even before Cameron was PM. Back in the late noughties, after he became Tory leader, Cameron aligned the Tory MEPs not with the European People's Party (EPP), the main centre-right bloc of MEPs and the biggest and most powerful group within the European Parliament, but with a smaller group further to the right, called the ECR. That was a huge tactical error. Cameron should all along have been at the top table of centre-right European leaders, negotiating behind closed doors with Merkel and (at the time) Sarkozy. Instead he was bullied by his backbenchers into exiling himself (and us) to a relatvely insignificant fringe group.
If he had not shot himself in the foot by doing this, I think the more recent history of our discussions with other EU leaders about control of our borders could have been very different.
As I've suggested before in this thread, in the end politicians are judged at least as much on their competence as on their policies. Sadly, this was one area where Cameron has been woefully incompetent.