Sentinel ABM
... that opinion turned so sharply against the Sentinel ABM system during the 1968 elections, that incoming President Nixon was forced to cancel the program?
... that opinion turned so sharply against the <b id="mwBTU"><a href="./Sentinel_program" id="mwBTY" rel="mw:WikiLink" title="Sentinel program">Sentinel ABM</a></b> system during the 1968 elections, that incoming President <a href="./Richard_Nixon" id="mwBTc" rel="mw:WikiLink" title="Richard Nixon">Nixon</a> was forced to cancel the program?