Galactic synchrotron will be an important contaminant for forthcoming experiments on CMB polarization. We investigate the angular power spectra of polarized Galactic synchrotron in several surveys (Parkes at 2.4 GHz, Effelsberg at 2.7 GHz and 1.4 GHz), showing that partial sky coverage analysis may lead to largely different results. Reasonable extrapolations to tens of GHz allow us to find a region in the(v,l)plane where the CMB polarized signal is expected to prevail largely. ©2001 American Institute of Physics.