Partisan bias refers to the tendency of individuals, including analysts and media, to favor one political party over others, leading to distorted interpretation of facts and events. This bias can affect political analysis, as it may result in selective reporting and confirmation of pre-existing beliefs. Consequently, such biases impair the public's ability to critically evaluate policy decisions and party performance. It also influences how policies are debated and understood in the public domain, potentially leading to a less informed electorate and increased polarization.