Hillary Clinton has announced the endorsement of more than 40 business leaders, part of an effort to win support from independents and Republicans worried about Donald Trump.

Many of the chief executives touted by the campaign Thursday had previously declared their support for Clinton, including Facebook's Sheryl Sandberg and Berkshire Hathaway's Warren Buffet. But the group also includes some longtime Republicans like AT&T Services Inc's Jim Cicconi and Dan Akerson, formally of General Motors Co. and Nextel Communications Inc.

Their support comes two days after Clinton delivered a speech warning that Trump's economic policy would lead the country back into recession.

The Clinton campaign has been working to organize support from Republican business leaders and foreign policy experts, who question Trump's experience and policy plans.

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