Was Blair more influential in opening the door to 1 million Eastern Europeans into the UK in 2004 when the EU expanded?
Did he create the Frankenstein Farage?
Was Cameron more influential when he gave the referendum to stop losing Tory voters to UKIP?
Racist chancer may be a better description. it's subjective.
influential synonyms: powerful, authoritative, dominant, controlling, strong; important, prominent, predominant, leading, prestigious, distinguished, noteworthy
"the most influential political organization on the continent"...