Utilize the input text as a context reference, choose the right relationship between 'Squawk Alley' and 'CNBC' from the options.
Options: original broadcaster, chief executive officer, legal form, platform

This resurgence by U.S. stocks could lead to tougher negotiations between Greece and its creditors, Daniel Speckhard, a former U.S. ambassador to Greece and Belarus, said in a CNBC " Squawk Alley " interview.
original broadcaster