Under Secretary of State Katzenbachs letter to the chairman of the Committee on Foreign Relations to this effect is contained in the committee report on the bill now being considered by the Senate. Furthermore. since this bill was considered by the committee. President Johnson. in a letter to the Congress on February 23. has asked that "unnecessary and cumbersome barriers" inhibiting foreign visitors and businessmen traveling to the United States be eliminated. He proposed that the Secretary of State and the Attorney General be authorized to issue regulations exempting visitors to the United States from visa requirements for all but the most serious grounds of ineligibility. Mr. President.