The great Howard Baker asked a question for the ages in 1974.

“What did the president know,” the late Republican U.S. senator from Tennessee asked, “and when did he know it?”

Baker was serving as vice chairman — and ranking Republican — of the U.S. Senate select committee that was investigating the Watergate scandal that eventually forced President Nixon to resign and sent several of his top aides to prison.

The question came during one of the many hearings the committee was conducting to ferret out the truth of what was blown off initially as a “third-rate burglary” of the Democratic National Committee offices at the Watergate office complex in Washington, D.C.

I know that pundits have posed the question. I also have heard some pols ask it in the context of conversation.

But now we are being faced with the same scenario that confronted President Nixon and his top campaign and White House aides. It involves a meeting involving Donald J. Trump Jr., Jared Kushner (son-in-law of the president), and Paul Manafort, head of Donald J. Trump’s presidential campaign. They met with a Russian lawyer who sent them all an email advising them that the Russian government had some dirt on Hillary Rodham Clinton it wanted to pass on to the Trump campaign.

The revelation of the email now focuses investigators more sharply on whether the Trump campaign cooperated with Russian officials who were hacking into our electoral system, seeking to undermine Clinton’s effort to defeat Trump.

Did the three men — two of whom are members of the Republican presidential candidate’s family — advise the Big Man of the meeting in advance?

What did the president know during the campaign and when did he know it?

I am awaiting that question to come in some formal venue — say, at a congressional hearing. I also am awaiting the president’s answer.

Is there another Howard Baker out there among congressional Republicans who would dare ask that question?