Silly bugger whose next-but-one successor was worse (6,1,4)

I believe the answer is:

george w bush

'next-but-one successor was worse' is the definition.
(reference to Donald Trump)

'silly bugger whose' is the wordplay.
'silly' indicates an anagram.
'bugger'+'whose'='buggerwhose'
'buggerwhose' is an anagram of 'GEORGE W BUSH'.

I've seen this clue in The Guardian.

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