Promote Delaware and Maine repeatedly as all the same in Paris (4,2,4)

'all the same in paris' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'promote delaware and maine repeatedly' is the wordplay.
'maine repeatedly' can mean two substitutions for 'maine'.
'promote' becomes 'tout' (I've seen this in another clue).
'delaware' becomes 'DE' (abbreviation).
'and' says to put letters next to each other.
'maine' becomes 'me' (abbreviation).
'maine' becomes 'me' (abbreviation).
'tout'+'de'+'me'+'me'='TOUT DE MEME'

'as' is the link.

Can you help me to learn more?