This chapter begins applying the theory to the core cases, starting with Trumpism in the USA and Euroscepticism and Brexit in the United Kingdom. It traces the evolution of the populist radical right in both countries; throughout the process, economic trauma, compounded by inadequate or imprudent political responses to the unfolding crisis, stoked and inflamed cultural tensions. Yet in both cases, discontent failed to break through the political status quo as radical right antecedents like the Tea Party and the UK Independence Party (prior to Farage’s ascension to leadership) failed to embrace their supporters’ cultural radicalism. Only when Trump and Farage began to explicitly connect economics, culture, and politics did radical right populism manage to provoke a rupture. We support these arguments using original survey data in the USA, the British Election Study, and analyses of Trump’s rhetoric.