Jonathan Karl interviews Republican presidential candidate Marco Rubio, ABC News legal analyst Dan Abrams stops by to discuss the potential legal battle between GOP candidates Donald Trump and Ted Cruz. --- FOLLOW: Jonathan Karl, ABC News Chief White House Correspondent Twitter: @jonkarl Rick Klein, ABC News Political Director Twitter: @rickklein Matt Dowd, Chief Political Analyst Twitter: @matthewjdowd ABC News Politics (http://abcnews.go.com/Politics/) Twitter: @ABCPolitics ABC News (http://abcnews.go.com/) Twitter: @ABC
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