Is there good enough polling to know who 18-34 year olds generally support?
I guess 'good enough' makes it difficult to respond. For the last few elections only ISOR have released breakdowns of their exit polls by age/qualification. According to them, the parliamentary election saw a marked departure from the usual dominance of the PNL among younger voters. But as recently as the locals earlier this year, the winning PSD candidate in Bucharest was running a distant third with 18-34 year olds, who were the strongest supporters of the USR.
Interesting to see how the left-right (if you can even call it that in Romania) young-old divide seems quite different than in the rest of Europe. It makes sense, though, since it's not like the PSD really pushes "young people" issues like a lot of other social democratic parties.
This is the case in a lot of conturies. It depends on the demographics of such a society and contury, and what they grew up. Age, gender, race go with all of that. Yes, PSD is more left-wing, to say otherwise is absurd.