It occasionally happens that two cartoonists come up with very similar cartoons purely by chance. And that's the case today with these cartoons by Peter Brookes from The Times and Adams from the Daily Telegraph. Both cartoonists use the story about US tightrope walker Nik Wallenda's blindfold high-wire walk between the two Marina City towers in Chicago as a metaphor for David Cameron's ongoing difficulties with Europe, which could eventually lead to the UK leaving the EU.
The suggestion in both cartoons is that Cameron is playing a very risky game with the EU, which could end in disaster. The fact that he is blindfolded implies that he does not know where he's going, politically speaking.
A high wire (or tightrope) is a rope or wire that is stretched high above the ground, and used by circus performers. Metaphorically speaking, a high-wire act is something that you have to do very slowly or carefully, because it involves a lot of risk. • The university press is not allowed to either make or lose money—that's a high-wire act.