The dirtiest campaign in living memory is underway. The only thing separating the battling partisans now is the color of the mud.
Furthermore, the terms liberalism and conservatism (let's as well include liberalism's sanitized substitute word, progressivism) are virtually useless. Both have been so smeared by propagandists associating feelings and trained responses with them we cannot take either seriously when spoken in public discourse. A good argument can be made that Americans who today call themselves "liberal" are in fact the conservatives, i.e. those working to preserve the status quo, where those we call "conservative" are the liberals, i.e. those trying to achieve a new order. It is best to attempt to avoid using the terms.
There nonetheless are basic differences in the world views of the left and the right. That in itself is a lengthy topic. A few of the leading ones, however, are individualism vs. collectivism, an orientation toward due process vs. a focus on outcomes, a reliance on the concept of free markets vs. faith in statism. We ought to be talking more about this, but in the midst of a nasty campaign it is not going to happen.