Why was Reagan successful with ending the Soviet Union, while the Democrats were supporting Unions?

Democrats have a History of Espionage for the Soviet Union, against the United States. Democrats Julius and Ethel Rosenberg were Electrocuted by a Republican President, who put the Democrat Espionage Network out of Soviet Union business. Morris and Lohan Cohen were another American Democrat couple who were sent to prison in England for spying on the United States for the Socialist Soviet Union.