I'm sorry, but... what?
The Executive is the one closest to this qualification, but Lula, Haddad, Zé Múcio, Tebet and the others in power are nowhere even close to being socialists! Lula perhaps, until about a couple decades ago was a little bit closer but now he's not even on the left very much.
The Congress and the Senate, on the other hand, are mostly in the hands of neopentecostal evangelicals, the pro-gun nutjobs, the agrobusiness tycoons and other capitalists and fascists.