What US president increased US military and economic pressure in the USSR?

Truman did not fully trust the USSR and impressed them with the A-bomb. As the war ended, their goals in Eastern Europe became clear and Truman kept a standing army in the US. Eisenhower and Kennedy stood up to the Russians and applied what pressure they could. Johnson, Nixon and Ford worried about SE Asia and China more than the USSR, but Ronald Reagan scared them and eventually saw them fall apart.