Republicans have signaled early, in two key State Senate races, that they are ready to go negative with crude attack mailings with November’s election day still 99 days away. The stakes, in what’s expected to be a multi-million-dollar battle, are big scale. A Republican-dominated coalition has run the Washington State Senate for the past two years. Democrats are seeking to take back control. A key renegade Democrat, Senate Majority Leader Rodney Tom, is retiring from the Legislature.