Phonetic only:
罗 'Luó' for 'Ru-/Ro-',
斯 'sī' is the standard Mandarin filler for the 's' consonant in foreign names (cf.
道格拉斯 Douglas,
詹姆斯 James),
克 'kè' for the final 'k' sound. Most likely refers to Dean Rusk, who as Kennedy's and Johnson's Secretary of State was the public face of US Cold War diplomacy through the Cuban Missile Crisis and the Vietnam War.