Video debate: As a deadline looms of August 2nd to raise the US debt ceiling or risk default, can Republicans and Democrats find any common ground on the budget? Plus do growing concerns in Brazil about an overheating economy and rising inflation mark the end of "Lulismo", the economic model of former president Lula da Silva? In the chair, analysis editor Frederick Studemann debates the issues with FT colleagues James Politi, US economics and trade correspondent, John Authers, head of Lex and John Paul Rathbone, Latin America editor.