Most politicians aren't independent: they are members of parties and, generally, push for the same kind of policies, "the party line".

The Paris mayor is a member of a left party, the Parti Socialiste (PS). The same people who tend to cry foul when plants close down and people are laid off. This party is also more or less in some form of alliance with the Green Party who's also very much against cars. In the lower chamber no party has an absolute majority, but through (shaky) alliances, "the left" has the most seats (still no absolute majority, though). Also, many members of the President's party used to be members of the PS (including President Macron).

So, I'm pretty confortable lumping all these people together, since, broadly-speaking, they defend the same policies, even though there may be the occasional difference.