Washington (CNN) 2020 presidential candidate Bill Weld laid out his strategy Wednesday to challenge Donald Trump for the Republican nomination, asserting that he's running to "win" and not to "weaken" the President.

"I'm not sure how serious Mr. Trump is about governing, honestly. He has a one-word environmental policy: 'hoax.' A one-word immigration policy: 'wall.' I think sometimes his lack of experience in preparation for the office shows," Weld told CNN's Alisyn Camerota on "New Day."

The former Republican governor of Massachusetts said he'll be focused initially on the New England region, "with particular emphasis on New Hampshire."

"If I can show well in New Hampshire, even win the New Hampshire primary, that has kind of a domino effect on other primaries around the country -- almost an electrical effect," Weld said.

From there, Weld said he will focus on the mid-Atlantic states and plans "early on" to do a sweep through the West Coast "partly for fundraising and partly for political reasons."

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