To paraphrase WB Yeats: ‘Is that the ghost of Richard Nixon, beating on the door?’ Is ‘tricky Dickie’ back again, proclaiming himself as the President for ‘law and order; standing outside St John’s Church, holding the bible amid the clouds of tear gas and summoning the ‘silent majority’? For those who, like this writer, lived through the extraordinary events of America in 1968, the sense of Deja vu was intense watching Donald Trump in recent weeks, stepping into the shoes of America’s great political Beelzebub. Trump’s presidency is deep in crisis and the prospect of electoral melt-down looms.   His crackpot…