Probe of first lady and sons income tax, asked of Congress by N.Y. Solon. Washington D.C. July 9. Congress was asked today to examine the income tax returns of Mrs. Franklin D. Roosevelt, James and Elliot Roosevelt, sons of the President and Mrs. Roosevelt, by Rep.Hamilton Fish, Republican of New York, when he appeared before the Special Congressional Committee on Tax Evasion. At the same time he also asked a probe of the tax returns of Secretary of Treasury Morgenthau and the Secretary's wife and father Henry Morgenthau, Sr. 7/9/37