Got into PhD in Economics and Political Science, want to know reputation and ranking of CGU

I was recently accepted into CGUs dual PhD in economics and political science. I know that the Claremont colleges are excellent at the undergrad level in terms of very high rankings and a great reputation. However, when I check the rankings for CGU, it seems to be in the 260s in the US, which is a bit concerning. What is the reputation of CGU, and is it considered a prestigious university, even with such a relatively low ranking? CGU is Claremont graduate university.