Citizens of this country and the world learned yesterday that our President could not threaten to limit American support of the United Nations as a means of persuading the Soviet Union and other defaulting members to pay their bills because American support had already been limited by the House. Mr. Speaker. the country and the world learned yesterdayjust a week before Christmasthat the selfproclaimed "greatest deliberative body in the world" had voted to slash its contribution to the Childrens Fund. which feeds millions of hungry children. to cut back on the Palestine refugee fund which currently sustains nearly 1 million destitute Arabs at a cost of 8 cents a day for each refugee. to reduce economic aid through which the United Nations Is trying to save the Congo from slipping back into chaos. And today. Mr.