Barack Obama kicked off his presidency by limiting his administration's vulnerability to lobbyists. By May, however, it seemed clear that resourceful Democratic Party insiders would circumvent the limited ban. San Francisco's Amazon Watch has just denounced former Clinton Administration trade representative Mickey Cantor for violating the spirit of the Obama rules by lobbying his old bureaucracy on behalf of Chevron Texaco. Cantor has been lobbying the U.S. government to help quash $27 billion i