That may or may not be, but in the end it is a different question than the one I raised. One might have an electoral college system without a state by state win

That may or may not be, but in the end it is a different question than the one I raised. One might have an electoral college system without a state by state winner take all, which can lead to particular districts in particular states having outsized influence on the national election, and as such presents itself as a manageable target for foreign influence campaigns. This seems, to me, a national security risk that should be mitigated...and is much easier to mitigate than, for example, depending on efficient removal of foreign state-powered advertising campaigns.