Mitt Romney’s likely nomination as this year’s Republican candidate for the presidency still hasn’t been accepted by Rep. Ron Paul’s (R-TX) supporters, who roundly booed one of the former Massachusetts governor’s sons Saturday evening.

According to The Arizona Republic, Paul supporters waged their frustration at Josh Romney during his speech at the Arizona GOP convention.

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“We cannot afford four more years of President Obama,” Josh Romney said. “We need someone to step in there and turn things around.”

The incident is the latest event displaying how the Romney campaign may have to deal with Paul’s loyal backers at the Republican National Convention. The Texas congressman is still gaining delegates, while his supporters are having a major impact at state Republican conventions.

WATCH: Video for KPNX-PHX, which was broadcast on May 12, 2012.