LOSER LEMON WEDGES HIMSELF INTO TIGHT SPOT!

Lemon's stress shows in the way he treats people on the setand he'll be gone by year's end, according to an insider

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DEMOTED anchor Don Lemon is feeling the squeeze, according to sources who say CNN’s former nighttime poster boy has been throwing raging rampages on his new daytime set as he uneasily waits to be canned for keeps!

Insiders reveal Lemon, 56, has been on edge since being dumped from his plum primetime position last year — yet staffers were still stunned when he viciously berated CNN This Morning co-anchor Kaitlan Collins for interrupting him on air during an early December show.