David Cameron spoke about the differences between US and UK political campaigns in his appearance on the Late Show with David Letterman.
Ouch! David Cameron may regret ever appearing on the Late Show with David Letterman.
David Cameron was subjected to a quiz on British culture and history as he appeared on one of the US's most influential chat shows.
The Prime Minister has agreed to an interview with David Letterman - a host notorious for setting his own agenda. This could be interesting.