"Our MLAs and leaders are getting threatening messages from conduits who are posing as relatives, well-wishers and acquaintances," Rawat told reporters here.
"I am also being kept under surveillance as if I am an anti-national," he alleged.
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Rawat alleged that his phones and those of his relatives and aides were being tapped. "Central agencies are harassing Congress people through various ways," he alleged.
"Central agencies are openly being misused and not only my MLAs but political leaders are being threatened," he said.
His allegations came on a day another video of a purported sting operation was released allegedly involving Rawat and he was accused of indulging in horse-trading.
Asked about the video, Rawat said that he had no information about it as of now.
The Congress leader voiced confidence that he will win the trust vote which will be held on May 10 following the direction of the Supreme Court.
The apex court was hearing the Centre's petition challenging the revoking of President's rule by the Uttarakhand High Court on Rawat's plea.
Rawat also targeted former chief minister and rebel leader Bijay Bahuguna and his son Saket, saying they had "ganged up" with BJP leader Kailash Vijayvargiya to topple his democratically elected government.
He also alleged that Bahuguna and former Congress leader Bhupesh Upadhyaya's wife were involved usurping land of the displaced people of Tehri and demanded a high-level probe into the matter.