Republican presidential candidate Donald Trump intensified his criticism of Hillary Clinton after she said he had a "penchant for sexism," warning his Democratic rival against using the woman "card" and drawing his full attention.

In a familiar pattern for Trump, he responded to fire — this time over a vulgarity he used in describing Clinton's 2008 primary loss — with fire.

"Be careful Hillary as you play the war on women or women being degraded card," Trump said in a Twitter post on Wednesday.