>The Voteview project (now based at UCLA) has, since the 1980s, employed the roll-call votes cast in Congress to locate all senators and representatives on a liberal-conservative ideological map. These data and methods have been utilized by academics in thousands of peer-reviewed books, book chapters and journal articles. Although no method is perfect, there is a general consensus within the academic community that the NOMINATE methodology employed by the Voteview project and its close cousins represent the gold standard.
https://thehill.com/opinion/campaign/4816859-kamala-harris-i...
You can look at the data yourself: https://voteview.com/data
And its not shocking right? She represented California, which is obviously one of, if not the most, liberal state in the country.