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.
Take context from the input text and decide on the accurate relationship between 'Squawk Alley' and 'CNBC' from the options provided.
Options: chief executive officer, platform, legal form, original broadcaster