Obama did the very thing Nixon was about to be impeached for.
If this gets out to the public millions of younger Americans will get a good education in what really happened in the 70's. That's why the media is covering the whole IRS story up.
Nixon is just a vague name for most people.
This business is something for today. The proper attack is to go after IRS people on corruption charges. Nobody likes the IRS, and that is easier to sell.
And for what its worth, the US government, its personnel, the press, and even the politicians were far less partisan, far less corrupt, and had much better personal morals back then. The left exploited the fundamental honesty of the system. These days Nixon’s activities or their modern equivalents could not possibly rate such a political crisis.