[miguelxt]

I guess they are No True Scotsman, but according to themselves [0], to the EU parliament group they belong [1] and my own personal observations, they can mostly be classified as social democrats.

[0] https://www.psoe.es/el-socialista/reflexiones-sobre-la-nueva... [1] https://www.socialistsanddemocrats.eu/who-we-are/our-presenc...