Speedwell:
I stress the three "t" syllables - "to," "tal," and "tar," and the same stress pattern holds for "totalitarianism."

As to "hot dog" and "groundswell" , I stress the first syllable only in both words (unless, of course, I am assenting to a proposed exciting activity; then, I might say, "Hot Dog!", stressing both syllables.)

Is this, then, a regional pronounciation? I live in Northern New Jersey.