In what was an absolutely brilliant interrogation by David Speers of Sky News the Leader of the Opposition was reduced to bubbling incoherence, saying that he really does not support the mining tax in Perth. But we know he supports the mining tax here in Canberra. This is a Leader of the Opposition who supports one thing in Perth and a different thing in Canberra. A Leader of the Opposition who decides what he supports depending on what city he is in is not fit to exercise leadership in this country.