Cut it. It will return.

I would leave it be for now - the last year's dead foliage will give the plant some protection if the cold continues (as it is here....!) Once the weather is back to more normal, consistent spring temperatures, then cut it back. Veronicas are pretty hardy (that one is listed as hardy to zone 4); I would think it should survive OK - whether you cut it back or not probably....

V. 'Georgia Blue' winters over just fine here, so I imagine yours is just fine. I don't cut it back - the dead leaves drop and new ones form. Here's mine in May without having been trimmed.
{{gwi:197924}}From May, 2011

Thanks all ~ can always count on Gardenweb friends to talk me down off the ledge ! Sure miss the mass of blue this time of year, but just knowing it's not dead is worth missing a season of bloom. Thanks again.