Hurricane Gustav is causing more RNC schedule changes. The Insider has learned that first lady Laura Bush and first lady hopeful Cindy McCain have canceled plans to make a joint appearance at the RNC in Minneapolis on Monday, says a White House press release.   President George W. Bush, who announced earlier Sunday that he will also not appear at the RNC Monday, has gone to Texas to be with emergency response teams and evacuees -- although he is thinking about possibly speaking through a video feed.

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