Retooled immigration legislation that could get a vote in Congress by spring amounts to "amnesty" for millions of undocumented workers, Rep. Peter King (R-L.I.) fumed yesterday. "I just have no support for this at all," King told The Post. "This is clearly amnesty." King was responding to word that a bipartisan bill is being prepared for consideration by the new incoming Congress. According to a Senate Democratic aide, Sens. Ted Kennedy (D-Mass.) and John McCain (R-Ariz.) have already opened "preliminary" discussions with two House members over the revised legislation. Negotiators are considering scrapping a complicated proposal that would require an...