When something goes wrong, I start with blunder, confusion, and miscalculation as the likely explanations. Planned-out wrongdoing is harder to pull off, more likely to backfire, and thus less probable.

But it is getting more difficult to dismiss the apparent Russian role in the DNC hack as blunder and confusion rather than plan.

“Real-world” authorities, from the former U.S. Ambassador to Russia to FBI sources to international security experts, say that the forensic evidence indicates the Russians. No independent authority strongly suggests otherwise. ( Update the veteran reporters Shane Harris and Nancy Youssef cite evidence that the original hacker was “an agent of the Russian government.”)

the veteran reporters Shane Harris and Nancy Youssef cite evidence that the original hacker was “an agent of the Russian government.”) The timing and precision of the leaks, on the day before the Democratic convention and on a topic intended to maximize divisions at that convention, is unlikely to be pure coincidence. If it were coincidence, why exactly now, with evidence drawn from hacks over previous months? Why mail only from the DNC, among all the organizations that have doubtless been hacked?

The foreign country most enthusiastic about Trump’s rise appears to be Russia, which would also be the foreign country most benefited by his policy changes, from his sowing doubts about NATO and the EU to his weakening of the RNC platform language about Ukraine.

None of this is proof. But it is a vivid manifestation of a long-building reality: the chaos that can be unleashed in the new era in which everything is known and anything can be leaked. Concern about these effects goes beyond party. The very conservative defense figure Edward Timperlake wrote about it recently. In Slate, Franklin Foer says the DNC episode is “Watergate, but much worse.” Paul Waldman of the WaPo writes to similar effect. Thomas Rid, a security expert at King’s College, London, says that because “all signs” indicate Russian involvement the U.S. should respond:

American inaction now risks establishing a de facto norm that all election campaigns in the future, everywhere, are fair game for sabotage—sabotage that could potentially affect the outcome and tarnish the winner’s legitimacy.

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These new developments underscore the importance of an old, familiar point: now, more than ever, Donald Trump must release his tax returns. To put it differently, the press should no longer “normalize” his stonewalling on this issue.

As another veteran figure in the defense world and political affairs wrote to me this morning:

In normal times, this [the Russian hacking] would be the lead on all network news. But these are not normal times. I am having trouble getting through to some people that this is a real thing. The very people who always say “follow the money” with regard to the Pentagon [or other boondoggle bureaucracies] don’t see that (a) Trump has been kept afloat for about 15 years by Russian oligarchs; and (b) Russia has a powerful incentive to see a US president who will end economic sanctions.

So Donald Trump should release his tax returns because in modern times that is the basic price-of-entry in national politics. (Along with a plausible — rather than Pyongyang Daily News-style — medical report.) He should do it whether or not Vladimir Putin ever existed or there was any Russian hack. That would be true in any candidate’s case, but especially this one. George Will has come out and said that Trump should release his returns because of questions about his ties to “Russian oligarchs.”

With 100-plus days until the election, a nominee about whom there are graver-than-usual financial questions is saying that, unlike previous candidates, he won’t make his finances public.