Don’t you think? There are definite problems with having a bicameral legislature: WASHINGTON – For Democrats determined to get a health care bill, Sen. Roland Burris is like the house guest who couldn’t be refused, won’t soon be leaving and poses a plausible threat of ruining holiday dinner. Suddenly, he can no longer be ignored. The Illinois Democrat, appointed by disgraced former Gov. Rod Blagojevich, says he’ll only vote for a bill to provide health care to millions more Americans as l