that r****t attack on American congress women.

We should not be surprised at all.

First off, Trump’s no longer hiding his r****m. I don’t think anyone can conclude that he’s anything other than a W***e S*********t after this particular episode. It’s been questionable (although not to my mind), and his supporters in the GOP have been able to deny it. That ship has now officially sailed.
Suggesting that US-born citizens should “go back where they came from” to fix the problems of their native country is particularly funny from where I’m sitting: after all, the biggest problem in their native country at the moment is Donald Trump, and the views he is espousing. The irony there is hilarious.
If we’re talking about ancestral immigration, it’s worth noting that Trump’s own mother was born in Scotland, rather than the US, and his paternal grandfather was German. His own roots as an American don’t run all that deep, so for him to suggest that others are somehow not American for having similar ancestry is pretty hilarious.
Perhaps we should look into Melania’s heritage, while we’re at it? She’s not an American by birth either, and she entered the US on a visa that doesn’t really describe her: she entered on an EB-1 visa, designed for “priority workers with extraordinary abilities”. She doesn’t qualify in the least bit.
The slow speed at which the Republican Party have responded to Trump’s offensive remarks make it clear that they condone the r****m in question, and aren’t the least bit interested in holding the President accountable. That, ladies and gentlemen, show how far the United States has fallen in this regard - no longer can we consider a President as being held to the highest standards. Now we simply have to try to avoid tripping over a bar set to the lowest.