TheStreet spoke with T-Mobile (TMUS) CEO John Legere and Sprint (S) CEO Marcelo Claure following their merger announcement on Sunday.

"It's critical for America," said Legere, referring to the merger. "One of the reasons I'm so confident about this deal being approved is that American policy needs to support things that will spur innovation in the 5G cycle."

Legere said the U.S. is behind in 5G. "And we're possibly losing our leadership to China or South Korea," he said. 

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