Yes, Watergate doomed Viet Nam. However, it also doomed Cambodia where the Commies held a bloodbath that murdered nearly 2,000,000 innocent men, women and children.
It also doomed another 500,000 Vietnamese who were pushed into the sea and drowned.
Felt is wholly responsible for this.
Amazing consequences from the actions of an embittered loser, aren't they? Everything I've read is that Felt's sole concern about his sneakthief conduct was was how he would be perceived by the other FBI agents for violating his oath; I wonder if Felt ever spent one second thinking about what his perfidy led to -- the mass murder of millions in SE Asia, the election of that clown Carter, the wasting of South Vietnam, hundreds of thousands of boat people, political instability that led the former Soviet Union to do things like invade Afghanistan, the weakening of the presidency. And the most bizarre thing about this is the thought, spread by Ted Koppel, Brokaw and other sycophants, that Felt did this with patriotic motives to save the country from a crime wave in the White House WHEN FELT HIMSELF HAD AUTHORIZED AND ORCHESTRATED FAR WORSE BLACK BAG JOBS, ILLEGAL WIRETAPS, AND FELONIOUS BREAKINS THAN NIXON EVER DID!