Dan Roberts, The Guardian

Two of the most vocal groups of activists in presidential race will be separated by a single street in downtown Milwaukee

The Republican establishment was reeling on Wednesday as a triumphant presidential primary night for Donald Trump failed to unite the party against an increasingly confident-looking Hillary Clinton.

Dr Krissy Haglund does not care if she is labeled a socialist. Or an ideological purist . Or, indeed, any of the other epithets thrown at Americans who are flocking to support Bernie Sanders for the Democratic presidential nomination. She knows what she is: fed up.

It is an unlikely-looking spot from which to plot a revolution. The third-floor suite in Burlington that serves as the national headquarters for Bernie Sanders’ insurgent presidential campaign in fact looks more like a small-town law office: surprisingly busy for a Friday evening, perhaps, but hardly the den of communist sympathisers some Democratic opponents claim it to be.

Attacks on Bernie Sanders by rival Democrats are likely to turn increasingly to his record on the economy and foreign affairs, according to a new dossier seen by the Guardian that accuses him of sympathising with communists and “not believing in capitalism”.