Judges shouldn't lean but follow the law constitution while adapting to the times. The US constitution is frozen in time for historical and social reasons, the mechanism of amendment is difficult, and it is difficult for America to evolve socially or even legally. In America you have a rough copy of the Imperial British government of the 18th century, the brits evolved, America did not, the written constitution prevented it. The president became the King with his powers at the time and more added later, the house replaced the house of commons, and the appointed senate (back then) took the place of the Lords.
Thus, the constitution must be a living document that the courts must change in order for society to adapt, if it is a dead document as the originalist and federalist claim and the intentions of the founders are paramount, then it cannot adapt. So much social change in America happens in the courts and they have been compromised by fascist and religious lunatics who only loosely follow the constitution when it comes to women's basic human rights for instance, much less their constitutional ones. Why their interpretations of the 2nd differ so wildly from the text and intent of the constitutional mistake. So, courts have to be politicized in America because grid lock prevents social change too and minority rules by blocking change in the house senate and even presidency, the house through gerrymandering and the senate represents geography, not people, the electoral college can elect a president with a minority of the popular vote, the filibuster can also impede change.