The coalition has been criticised for going it alone on foreign policy after pledging to reverse Australia's newfound recognition of Palestinian statehood.

Opposition Leader Sussan Ley has written to a group of US Republicans to reassure them if elected, a coalition government will revoke recognition of Palestinian statehood.

She said Labor's decision wasn't supported by the majority of Australians.

"The prime minister has got this all wrong, I mean he's talking big, delivering nothing and letting Australians down," she told Nine's Today program on Tuesday.

"He's claiming that unilateral recognition of Palestine will somehow help the hostages be released or deliver peace to that troubled region.

"We all want the war to end but recognition has to come at the end of a peace process."

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