Trump, 69, has support of 34 percent of the likely Republican primary voters against 20 per cent for Cruz, 45.

Florida Senator Marco Rubio is the only other Republican presidential aspirant to get pass the double digit support with 11 percent.

Ben Carson came fourth with eight percent. Trump was also leading the poll done earlier this month with 35 percent support, with Cruz at 20 percent.

With Cruz being his nearest rival at the national level, Trump has launched a scathing attack on the Texas Senator over Twitter.

Earlier in the day, Trump unveiled his latest campaign ad aimed at Cruz and focused on illegal immigration.

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