Labour leader Ed Miliband pounced on David Cameron's defeat in Brussels, calling him a "toxic" prime minister.
UKIP leader Nigel Farage - whose success prompted the rethink on Europe - claimed the vote was pushing Britain closer to the EU exit door.
ITV News Political Correspondent Carl Dinnen reports:
It should be no surprise that David Cameron failed to stop such a long-standing EU figure being nominated as European Commission president.
The PM's friends in Europe are bewildered that he would rather go down in flames than try for the best deal possible in the circumstances.
David Cameron is cruising for Euro-bruising over the election of Jean-Claude Jucker