If Trump gets the Presidency, you still can affect national level politics by voting in your Representative and Senator.
If Democrats hold Senate and House, they can protect us more from Trump. Every state matters, because every state has 2 Senators at a minimum (and Senators are very, very powerful). Senators are state-wide and therefore immune to any gerrymandering (only House Members have the Gerrymandering problem)
Only matters if you live in one of the like 7 swing states that matter, otherwise just vote for whomever you want.
If Trump gets the Presidency, you still can affect national level politics by voting in your Representative and Senator.
If Democrats hold Senate and House, they can protect us more from Trump. Every state matters, because every state has 2 Senators at a minimum (and Senators are very, very powerful). Senators are state-wide and therefore immune to any gerrymandering (only House Members have the Gerrymandering problem)