David Cameron is bracing himself for a bruising showdown with Brussels after he hardened his stance in a £1.7bn budget row with the EU as the European commission threatened to retaliate by placing Britain’s multibillion pound EU budget rebate on the table. As Britain appeared to lose a key ally in its battle with the EU, with the Netherlands suggesting that it would meet the demand on it for an extra payment, the prime minister insisted that Britain would not pay the full £1.7bn demanded by the commission. Full story >>
The cartoon by Chappatte from The International New York Times shows David Cameron (and his dog) looking out of the window of his official London residence 10 Downing Street. A policeman is standing guard outside and a Union Jack flag is fluttering above the door. On the floor, lies a doormat resembling the flag of Europe with the letters EU on it.
In informal English a doormat is someone who allows other people to treat them badly and does not complain, so that can't be what the cartoonist had in mind since it's the EU which is bullying Cameron. I think that Cameron has put the EU doormat there expecting people to wipe their feet on it (you can see the dirt marks), which is his way of getting his own back on the EU. Other interpretations are possible!