That’s a good point, but the representatives are roughly in proportion to the population; in NJ our rural districts are huge (and often Republican) but they can be offset with a few major urban toilets.
This is true of most states. Congress gets a few rural (usually more conservative) representatives. With the state wide election of Senators, you usually end up with liberals elected primarily by the cities.
The rural districts do not vote 100% conservative, no district votes 100% Republican or Democrat. If we could work in the more conservative areas to spread the values of conservatism and work to raise the voter turnout, we could make a difference in the state wide races. The Democrat do everything they can go get out their vote, we need to do the same.