Could we be seeing the beginnings of a movement to "traditionalize" certain seats of Congress?

What I'm talking about is that I've read and heard, over the last few times a Democrat seat went open, is a notion that it was someones seat, so only someone with those sames views is appropriate for it.

Like only a liberal and a health care proponent is worthy of the seat in Massachusetts.

It's not said outright, implied little more, but the language by the pundits and the candidates assume the sale.

It gives me pause, I think, could the long view be that of a large number of seats in Congress entitled on a tradition?