According to members of the Carter camp, Russian diplomats made their first approaches last October, after a news article predicted that Mr. Carter would win most of the Democratic delegates in Iowa. Initially, the Soviet diplomats went to the Carter campaign office in Washington, seeking campaign literature and speeches.

“Since February or March, and especially in the last month or so, they have been lighting up our switchboards and coming over regularly,” said an aide.

The aides mentioned three regular visitors and callers—Victor F. Isakov, counselor and fourth‐ranking man in the Embassy; Igor V. Lebedev, a third secretary, and Oleg N. Yermishkin, a press secretary.

“They told us that they were not happy at all with Jackson, and that he was the one person they didn't want to be nominated,” one Carter staff member said.

The Russian diplomats talked a great deal about Jewish emigration and argued that Jews, contrary to what is said in the United States do not want to leave the Soviet Union, the aides related.

“Most of the conversations with the Russians have been about how United States‐Soviet relations are falling apart because of the way they say Ford is trying to compete with Reagan for conservative votes,” one Carter source said.

Members of the Carter camp, many of whom are experienced in dealing with the Russians, indicated that they were aware of Soviet moves designed to influence previous Presidential elections. In 1960, it is general. ly believed by experts in the Russian field, the Russians delayed the release of U‐2 spy pilot Francis Gary Powers to help the electoral chances of John F. Kennedy over Richard M. Nixon. In 1968, Moscow is known by American negotiators to have urged the North Vietnamese to get negotiations under way with the United States to help Hubert H. Humphrey's candidacy against M. Nixon. In 1972, Moscow showered attention and friendship on Mr. Nixon in his race against Senator George McGovern.