Ron Elving

Now that Donald Trump Jr.'s emails have produced the kind of solid evidence the Russia connection story had been lacking, what had been mostly speculative reporting has instead become the first draft of history.

Expect that history to be much debated. All accounts of political skulduggery with foreign actors tend to be "tangled and murky," as one foreign policy historian has written.

President Trump plans a European trip next week for a gathering of representatives of the world's largest economies — including those of allies such as Britain, Japan and Germany, and rivals such as China and Russia.

Updated at 11:05 a.m. ET

Ordinary people often get into legal trouble in response to desperate circumstances. Politicians, however, seem to make the worst trouble for themselves when they are riding high and carrying all before them.

Thus the most famous political scandals of U.S. history have happened not when presidents or members of Congress had their backs to the wall but when their sails were filled with a favorable wind.

Until now, all the controversy over President Trump, his associates and their various connections with various Russians has been billows of smoke without a visible fire.

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