By LISA LERER
WASHINGTON (AP) - Democratic presidential front-runner Hillary Clinton is turning her attention to her would-be GOP challengers, particularly Donald Trump, and leaving her chief rival, Vermont Sen. Bernie Sanders, gasping for airtime six weeks before the first round of primary voting.
Clinton plans to intensify her campaign schedule with a series of multi-day swings through Iowa starting in January, interspersing trips there with stops in New Hampshire and other early primary states. Her campaign will also unveil what Clinton has called her "not-so-secret weapon" - her husband, former President Bill Clinton.
Her campaign was forced to engage with Trump on Tuesday after he used a vulgar Yiddish term to describe her 2008 primary loss to now-president Barack Obama. She said voters "shouldn't let anybody bully his way into the presidency."
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