You need look only at Santorum's voting record to confirm that assertion.
RICK SANTORUM 2004 VOTES (per ACU)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
+ + - + + + + + + + + + + + + A + + + + + A + + +
ONE negative vote, 2 absences, 22 positive votes. Yessir, Marxism if I've ever seen it.
She's a grade-A kook.