The day before Newark Mayor Ras Baraka’s landslide re-election, changes in election districts and polling places prompted his campaign to file a lawsuit asking a judge to let voters cast ballots at any polling place in the ward where they lived. But the solution was not as simple as the campaign envisioned, and Superior Court Judge Robert Gardner denied the request at a hearing Monday afternoon. In an angry victory speech after polls closed the next night, Baraka denounced the judge’s ruling and the election officials who had imposed the changes, which the mayor said disenfranchised thousands …