Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

US Republican presidential candidate Donald Trump (R) is greeted on stage by fellow Republican candidate Ted Cruz before speaking at a rally organized by the Tea Party Patriots against the Iran nuclear deal in front of the Capitol in Washington, DC, on September 9, 2015.
US Republican presidential candidate Donald Trump (R) is greeted on stage by fellow Republican candidate Ted Cruz before speaking at a rally organized by the Tea Party Patriots against the Iran nuclear deal in front of the Capitol in Washington, DC, on September 9, 2015.

    JUST WATCHED

    Cruz warns: If Trump wins Iowa he might be 'unstoppable'

MUST WATCH

Cruz warns: If Trump wins Iowa he might be 'unstoppable'

CNN's Sara Murray reports.

Cruz warns: If Trump wins Iowa he might be 'unstoppable'

CNN's Sara Murray reports.