Iran Blackmail - Polititicans useless

Pressure on 'Europe'? Who speaks for this fictional country that is just a geographical term.
The blatant blackmail by the USA under Trump demonstrates that 'representative' democracy is unable to give citizens a voice. Our Politicians are meek, stupid or complicit with this effort to achieve world domination. Would a proper referendum and the observance of due legal process allow this state of affairs?
Direct Democracy exists exactly for that reason - to avoid shady backroom deals by weak politicians.
President Trump Is Putting Huge Pressure on Europe to Reinstate Sanctions on Iran

Why does the USA get away with blackmailing the rest of the World?

Answer: lacklustre politicians that do not have the interests of their citizens at heart. They don't want to rock the boat or are at worst clueless, if not stupid. Stopping the US from applying their 'laws' ex-territorially would be easy - all one would have to do is hit the US hard where it hurts, its banks, Internet and media oligopolies. One would be surprised how fast this boycott spook would be over. A system of Direct Democracy would not allow the ruling political caste to get away so easily.