A circle is nothing more than a series of really short straight lines.
So a small diameter cutoff wheel on the dremel may work.
A holesaw and a 1/2" drill motor would be better, drill the piolt hole first, then use the holesaw and arbor.
The basic question of politics is "Who does what to Whom?". -Vlademir Lenin.
"Politicians are always interested in people.
Not that this is always a virtue.
Fleas are interested in dogs." -P.J.O'Rourke