Washington: A US lawmaker has warned Palestinian President Mahmoud Abbas that America would have to re-examine its funding to his government if it goes ahead with the UN resolution seeking statehood.

"As a United States Senator, assuming that President Abbas moves forward with his unrealistic plan to seek a UN resolution, I will be obliged to re-examine all US funding provided to his government," Senator Robert Menendez said at a news conference.

If President Abbas insists on acting "irresponsibly" this week in New York, he will make clear that he "does not value America's support and assistance" to the Palestinian people and that Israel "does not have a serious partner" in the peace process, he said.

"My Senate colleagues and I, as we make difficult budget decisions in the months ahead, will have no choice but to re-evaluate the priority of US taxpayer contributions to the Palestinian Authority," Menendez said.

The New Jersey Senator said he has personally contacted leaders throughout the Western Hemisphere, asking them to oppose President Abbas in his unilateral attempt to gain UN recognition and to avoid negotiating with Israel.

"In my letters to these leaders, I have underscored the importance of bilateral peace negotiations between Israel and the Palestinian Authority as the only way to bring about a two state solution.

"In particular, I have called upon Brazil and Colombia, as members of the UN Security Council, to vote against the resolution," he said.

In another statement, Senator John McCain hailed Israeli Prime Minister Benjamin Netanyahu for "once again" offering to begin direct negotiations with the Palestinians for the purpose of ending the conflict and establishing a Palestinian state.

"I urge the Palestinian leadership to accept Prime Minister Netanyahu's offer, to end their destabilising effort to declare statehood unilaterally, and to resume negotiations with Israel as soon as possible without preconditions," he said.