A vote in the House of Representatives was heading towards a resolution that would require President Donald Trump to come to Congress for formal approval for his war in the Middle East.

But, the Speaker of the House pulled the vote as it became clear the Republicans were going to lose it.

Although it was unlikely that if the vote had gone through that anything would have resulted, yet US and Middle East correspondent Gordon Robison says this shows falling support for the war. 

"The fact that the vote was going to pass in the House indicates that support for the war is slipping and slipping very dramatically," he told Heather du Plessis-Allan.

"So it doesn't change anything in the short run, but as we approach elections in November, it indicates that the politics around the war are changing very quickly."

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