The US, then under President Jimmy Carter, initially considered its strategic nuclear weapons and nuclear-capable aircraft to be adequate counters to the SS-20 and a sufficient deterrent against possible Soviet aggression. In 1977, however, Chancellor Helmut Schmidt of West Germany argued in a speech that a Western response to the SS-20 deployment should be explored, a call which was echoed by NATO, given a perceived Western disadvantage in European nuclear forces. Leslie H. Gelb, the US Assistant Secretary of State, later recounted that Schmidt's speech pressured the US into developing a response.