'In our lane': Fed's Warsh defies Trump but still fighting for credibility

US Federal Reserve chair Kevin Warsh delivered the interest rate hike this week that many economists think surging inflation required, defying President Donald Trump -- but questions about the central bank chief's credibility linger. The White House insists that any inflation is due to the previous administration, with Trump advisor Kevin Hassett saying earlier this week that there was no need for a rate hike to tackle it.