Geoana gives green light for alliance

I don't really get it. For the county council in Valcea, the SDP(Social Democrat Party) and the DLP(Democrat Liberal Party) have made a political alliance, with the blessing of Mr. Geoana, the Social Democrat president. It is clear that politics in Romania is diluted: how can a Socialist party and a Liberal party forge an alliance, when their doctrines aren't compatible. More info when I have it.
Foto: Mr. Goana speaking, and behind him is former president Ion Iliescu, honorary president and senator

Source: http://www.realitatea.net/geoana-si-a-dat-acordul-ca-psd-sa-faca-alianta-cu-pd-l-la-consiliul-judetean-valcea_295032.html