"I tend to err on the side of security, I must tell you," Trump told conservative radio host Hugh Hewitt when asked about the metadata program.

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"When you have the world looking at us and would like to destroy us as quickly as possible, I err on the side of security," Trump added.

The position marks a contrast with Cruz, whom Rubio has targeted for opposing the bulk metadata program.

Trump and Cruz have maintained an amicable relationship throughout the 2016 race. The Texas senator has refused to criticize Trump while others, including Rubio, have sparred with the celebrity businessman.

Trump recently remarked that Cruz "actually backs anything I do, because we have similar views." Still, Cruz, who has been rising in recent polling, reiterated this week his belief that Trump won't be the GOP nominee.

Trump said his position in favor of the NSA data collection had been the same since before last month's terrorist attacks in Paris, which stoked fears of international terrorism and revived debate over government surveillance measures.