You have been referred to this page because you have claimed that the Donald Trump article is, in some way, biased.
Wikipedia's neutral point of view policy requires us to report the bad (negative) with the good (positive), and the neither-bad-nor-good, in rough proportion to what's said in reliable sources, which in this case are largely major news outlets. This is one of the five pillars of Wikipedia—a group of fundamental principles central to the function of this website. Since reliable sources are widely critical of Trump, this article reflects that.
Wikipedia policy is not established at individual articles. If you think that a policy should be changed, you could try Wikipedia:Village pump (policy), although you are unlikely to be taken very seriously there without a substantial history of Wikipedia editing.
A general, nonspecific claim of bias will not yield positive results and will likely result in closure and early archival of the section. You are welcome to suggest a specific, policy-based improvement, one that is supported by reliable sources (see WP:RS/P for a list of sources considered by the Wikipedia community to be reliable). This will likely initiate a discussion that may yield a consensus for a change to the article. If you wish to do that, remember to always assume good faith, to demonstrate good faith, and to be civil.
Some of the resources available to you are: