CNBC Daily Open: U.S. stocks dip and oil jumps as Iran, Fed independence concerns rise

The cancellation of meetings with Iranian officials by President Trump could indicate a shift towards a more confrontational stance, which may further destabilize the region and impact global oil supplies. Investors are likely to remain cautious as they assess the implications of these geopolitical developments on market stability and economic growth. The Fed's independence is also under scrutiny, which could influence monetary policy decisions moving forward.