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.
Refer to the input text as context and select the correct relationship between 'Squawk Alley' and 'CNBC' from the available options.
Options: platform, legal form, original broadcaster, chief executive officer