While multiple sources mention Abigail Spanberger and the context of the referendum, the specific numerical claim—that the Democratic party could increase its representation from 6 to 10 seats (a net gain of four) if a plan passed by the legislature in February and signed by Spanberger is enacted—is not directly corroborated by multiple independent sources. The evidence confirms Spanberger's involvement and the referendum, but not these specific pre-election projections.

The web search results discuss the timing of the midterms and the potential impact of the boundaries, but none of the retrieved evidence explicitly links the 'new district boundaries' being established *in time* for the November elections to determine House control for the *last two years of Trump's final term*. The evidence confirms the midterms and Trump's tenure but lacks this specific temporal connection.

The web search results confirm the existence of the 2026 amendment and that it involves state lawmakers regaining power. However, the specific detail that the authority *reverts* to the nonpartisan commission in October 2030 is not explicitly stated or corroborated by multiple sources; the evidence is limited to the proposal itself.