Its hard to say. In the micro sense, she won a hard Democratic area so it was of no real threat to turn Republican anyway. But in the macro, is it a hard left turn for the Dems? Is it the will of the people, the obvious response to the White Nationalism of Trump? And what does it mean for general Americans?
The GOP are spinning it as bad news for the Dems and they already have their talking points ready - that this represents a shift towards far left socialism (how long before they just call them Communists?). But the same has been said of the GOP where hard right Trump supporters have won primaries and the feeling is, thats bad news for the GOP in the general election.
But White Nationalists vs Socialists?
I would think the racist rhetoric of the alt right has a ceiling and its been reached. How many people voted for Trump as the anti-establishment, drain the swamp candidate and are appalled at what they helped create? Will they vote for the Dems? Would they vote for farther left Dems? Will they stay home?
And the other thing is, Hilary won the popular vote and did so without a lot of the support Obama got. There was a rejection of Hilary in many areas. Dems need a dynamic candidate in 2020. Probably a woman, I'd suspect. This could represent a progressive shift.
One thing is likely certain, no one will trust polling or predictions. The next couple of years will be a roller coaster. If the Dems take the House, they likely impeach Trump. But unless they somehow win a Senate super majority (which is highly unlikely), he wont be convicted unless there is clear evidence of crimes so heinous that the GOP turns on him.
If Republicans get thumped in November, there will be growing unrest in the party and a harsh Mueller report that essentially indicts the President might push them over the edge.
Russia will have its work cut out for it.