Many people supported the Conservatives because of David Cameron, while many people supported Labour despite Ed Miliband. Deteriorating opinions of Cameron will therefore have a bigger impact on the Conservatives' vote share than worsening views of Miliband would have on Labour's.

My father was one of the fortunate wartime servicemen: he made a full recovery from his injuries, was promoted to captain, survived the war, had a satisfying career as a colonial officer and, eventually, died in February 2002, a month before his 85th birthday.

While loyalists and defectors overall said John Smith did a better job of standing up for Labour's values, they put Blair ahead on representing the whole country, appealing beyond traditional Labour voters and offering strong, competent leadership; switchers to the Tories gave him a clear lead in all categories.

We spent too much time attacking Gordon Brown and Labour rather than setting out our own plans. People had decided they wanted change - the thing they were not sure about was the alternative we were offering, so going on and on about Labour missed the point.

My record proves that I don't make political or public-service decisions based on what typical folks in Washington do, which is, 'What's going to get me past the next election, or what's best for my career?'

There are things that government can do to incentivize the free market to do a better job, yes. But is that a replacement for getting in the way, actively, of the fossil fuel industry and preventing them from destroying our chances of a future on a livable planet? It's not a replacement.

National security laws must protect national security. But they must also protect the public trust and preserve the ability of an informed electorate to hold its government to account.

Iran is a bad and dangerous actor in a volatile region of the world, which is why Congress enacted sanctions in response to the ballistic missile program and support for terrorist proxy groups. We must hold senior Iranian leadership accountable for destabilizing actions in the region and around the world.