There is a rhythm to their rhetoric too.
Breakthroughs for Sanders in New Hampshire and Michigan brought an increase in scrutiny of his more radical candidacy – which only subsided after better nights for Clinton on Super Tuesday and in Ohio and Illinois on 15 March.
But since the last and probably still decisive setback for his campaign in Illinois Sanders has won 64% of the delegates in a string of more favourable small states that have cut Clinton’s delegate lead from 317 to 210.
‘She has made a deal with the devil and the devil wants his due’ said Weaver in a particularly blunt Sanders camp attack on her reliance on wealthy donations on Thursday.
‘If the Clinton campaign wants to engage in a more bare knuckle approach we are happy to do that as well’.
‘This is not the type of politics that I want to get in’ added Sanders in a typical speech in Philadelphia.
‘But if we are going to be attacked … if there are going to question my qualifications – I think I have a right to question hers’.