Unable to secure approval for his law in the Senate, Tiberius violated tradition by taking it directly to the Popular Assembly. When a colleague in the tribunate tried to stop proceedings by imposing his veto, Gracchus organised a vote and had the man deposed from office. This may or may not have been legal, since in theory the people could legislate on anything, but it struck at the very heart of the Republican system by challenging the assumption that all magistrates of the same rank were equal.