Squawk on the Street: Opening Bell 09/20/2019

<p>Carl Quintanilla, Jim Cramer and David Faber discuss the slow stock market march to new records. Plus, as new Apple iPhones hit stores globally, will it move the needle for investors? And Washington’s War on Tech - Facebook CEO Mark Zuckerberg meets face-to-face with some of his harshest critics in DC.</p>