How young? He received his bachelor’s degree in 1991, which makes him 40 years old if he graduated at 21. This should satisfy Obama’s critics on the left who have complained that his nominees thus far have been too old.
How liberal? He is the current Chair of the Board of Directors at the American Constitution Society. This should make Liu a trial balloon for the resistance to be faced by Obama’s chosen successor to Justice Stevens (if he does indeed retire). Of course, there’s a big difference in Senatorial apoplexy between nominating a liberal to 1) a circuit court and 2) the Ninth Circuit; and nominating a liberal to the Supreme Court.