Try to remember, if you can, how astonishing it was on Jan. 6, 2017, when America’s intelligence community made public its finding that Russia had intervened in our election to help Trump. Imagine if we’d known then just a fraction of what we know now, like the November 2015 email exchange between Felix Sater, a Trump associate and convicted felon with ties to Russian organized crime, and the Trump lawyer Michael Cohen, recently the subject of an F.B.I. raid. Sater boasted, “Buddy, our boy can become president of the U.S.A. and we can engineer it. I will get all of Putin’s team to buy in on this.” We still don’t know what Sater meant by this. Republicans have shown a staggering lack of interest in finding out.

Imagine if, as we were learning about Russian measures last January, we’d also found out about the Trump campaign chairman Paul Manafort’s offer to deliver briefings to a Russian oligarch to whom he was deeply in debt. And if we’d known that one Trump campaign adviser, George Papadopoulos, had been in frequent communication with someone who claimed to be from the Russian Ministry of Foreign Affairs, and that the F.B.I. suspected another campaign adviser, Carter Page, of being a Russian agent.

What if we’d also known that the Republican operative Paul Erickson wrote to a senior Trump campaign official about the “back channel” to the Kremlin he’d been cultivating through the National Rifle Association, and that Donald Trump Jr. met with Erickson’s Russian contact at the N.R.A.’s 2016 convention? I can’t help thinking that it would be harder to explain away the Trump campaign’s treachery if we’d been forced to reckon with it all at once.

Since the election, there have been so many revelations about Trump’s Russia ties that it’s impossible to keep track. “I sometimes wish that we would have just found out about the June 9 meeting, and that would have been it,” Eric Swalwell, a California Democrat on the Intelligence Committee, told me. He was speaking, of course, about the Trump Tower meeting between a Russian delegation and leaders of the Trump campaign, ostensibly arranged so the Russians could deliver dirt on Hillary Clinton as “part of Russia and its government’s support for Mr. Trump,” as an email to Trump Jr. put it.