I don't think that it's limited to only Republican employers. It's more a case of it being any employer that values maximizing the bottom line in general, and dividends to stockholders in particular, over anything else. Behavior like that transcends party lines - any way that they can decrease an expenditure (in this case labor costs) and get away with it, they're going to do it.
Also, if it's not illegals they're hiring, they're abusing the visa process if they're an international company.
Putting that aside, I wholeheartedly agree that drastic measures need to be taken against anyone that employs illegals.
I'd even go so far to say that, if there was a way to somehow bypass the 14th Amendment (which, because of case law, grants most of a citizen's rights to illegals), then housing and other services that enable illegals to stay here comfortably should be denied as well.
I've never met or known any Democrat employers that are big enough ass-holes to do such a thing.
LOL! How about Nancy Pelosi who hired them to work in her vineyards? How about all those Mexican restaurants are you stupid enough to think they don't hire illegal aliens? Hispanics are mostly Democrats and these restaurant owners certainly do hire them. That's just the tip of the iceberg.