By Matthew Lesh The Conservative Party is enjoying the sugar rush of a leadership campaign, but the grim reality of opposition will soon sink in, says Matthew Lesh The vibe at the Conservative Party conference this week in Birmingham was chipper. Well-lubricated members excitedly shuffled between drinks receptions headlined by the four leadership contenders. There were impromptu rallies, Pravda-style daily candidate newspapers, and colourful lanyards and badges. The hottest competition was for the merch, from Robert Jenrick’s ‘We Want Bobby J’ baseball caps to Tom Tugendhat’s ‘Tugend-tan’ fake…