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FORT WORTH, TX - FEBRUARY 26:  Republican presidential candidate Donald Trump speaks at a rally at the Fort Worth Convention Center on February 26, 2016 in Fort Worth, Texas. Trump is campaigning in Texas, days ahead of the Super Tuesday primary.  (Photo by Tom Pennington/Getty Images)
FORT WORTH, TX - FEBRUARY 26:  Republican presidential candidate Donald Trump speaks at a rally at the Fort Worth Convention Center on February 26, 2016 in Fort Worth, Texas. Trump is campaigning in Texas, days ahead of the Super Tuesday primary.  (Photo by Tom Pennington/Getty Images)

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    GOP leaders slam Trump over KKK stumble

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GOP leaders slam Trump over KKK stumble

The two top Republicans in Congress called out Donald Trump on Tuesday for failing to denounce white supremacist groups. Ed Lavandera reports.

GOP leaders slam Trump over KKK stumble

The two top Republicans in Congress called out Donald Trump on Tuesday for failing to denounce white supremacist groups. Ed Lavandera reports.