Russell was elected Member of Parliament for Portsmouth in the general election in March 1690. He conveyed Maria Anna of Neuburg, Charles II of Spain's future consort, from Flushing to Coruna in Spring 1690. He joined the Board of Admiralty led by the Earl of Pembroke, as Senior Naval Lord, in June 1690. Following the debacle at the Battle of Beachy Head in July 1690, Admiral the Earl of Torrington fell out of favour and Russell, having been promoted to Admiral of the Fleet, became Commander-in-Chief of the Navy in December 1690. He was fully engaged in providing naval support for the Williamite War in Ireland until the war ended in October 1691.