Those striving for the same object become like each other. The two political parties have so evenly divided the country, and constantly claim to be in the right, and if only they can gain a super-majority, will enact wise rule. Don’t believe it.
The rewards of gaining control are there, that is true. But to economize, parties act to protect their incumbents first. Moves into enemy territory extend supply lines for tenuous footholds. Political views map very closely with personal temperament, which means that they don’t change much. So holding a seat in a district or state that by temperament belongs to the other party is a drain on resources first, and second is a constant irritant to the stated program of the party.
Trump proposes to build a wall and pursue economic nationalism, but cannot get it through his own party. Obama cannot nationalize the medical industry because the by definition of political science, the final few votes will always be “moderates”. Yet we persist in believing that 1000 blog posts will turn the tide. In the case of Trump, the people who actually want the wall can never match in money the contributions of the Koch Bros and their ilk who don’t want to restrict immigration.
And the party is now set up to run primarily on this money, creating ads for mediocrities, because in truth, they don’t want to do what the activist base wants. Neither party. They will do just enough of it to get by, and depend on fights like Kavanaugh (who is not a conservative) to periodically galvanize the base in fear or hate.