This is how controversies evolve into full-blown scandals.

Something happens that raises eyebrows. Then we hear about more matters related — perhaps only tangentially — to the original event. Then more matters are heaped on all of that. Our attention gets stretched far beyond the original “sin.”

So it is happening now with the Ukrainian matter, the July 25 phone call that Donald Trump had the Ukrainian president and who else might have heard the two men talked about in that fateful conversation.

Trump is now known to have asked Ukrainian President Volodymyr Zellenskiy for help in his re-election effort, including getting dirt on Joe Biden, a potential 2020 campaign opponent.

Secretary of State Mike Pompeo said he didn’t know anything about the phone call; then we hear from a State Department official, talking to the Wall Street Journal, that Pompeo listened to the phone call in real time.

Then the president decides to throw Vice President Mike Pence’s name out there, suggesting that the VP might be involved in some manner.

Oh, and now comes news that Trump sought help from Australia’s prime minister for help in undermining former special counsel Robert Mueller’s probe into The Russia Thing.

What in the name of scandalous behavior is happening here?

Trump’s lawyer Rudy Giuliani, the formerly highly esteemed New York City mayor, has become unhinged. He rambles incoherently on national TV, accusing former Vice President Joe Biden of crimes that other prosecutors say are unfounded.

The House is force-marching its way toward impeaching the president on charges that he violated his oath of office by soliciting a foreign government for political assistance. Whether it results in conviction in the Senate, of course, remains a highly open question.

However, what could have been blown off as a mere “controversy” is becoming rapidly a full-blown “scandal” that will result in an impeached president running for re-election.

We are racing down heretofore untraveled roads.

Wow!