This is a critical question for both ends of Pennsylvania Avenue, and for every presidential candidate. But at least the President and Congressional leaders are talking about it--we've heard next to nothing from all the candidates for the White House, and next to nothing at all the debates.
I wonder: what happens to 18F, USDS, each agency's online engagement staff, etc. the day after a GOP candidate wins? What happens if the White House stays with Democrats? Beats me, and that's incredibly problematic.
Either way, Congress can and should also play a role in supporting--at least maintaining--the progress made on open source, adopting/creating better tech, outfits like 18F/USDS. Building out a Congressional-and-civil-society "tech transition survival" plan would be a great, bipartisan, bicameral project. I think it's also fully within the realm of possibility.