I want to stipulate up front that I do not favor impeaching Donald J. Trump, at least not at this moment. I need more “proof” that he has committed an impeachable offense than what we’ve seen to date.

However, I am laughing out loud at the talk we’re hearing from Republican members of Congress who are performing a remarkable act of duplicity while ignoring the issues surrounding Trump’s troubles. These matters mirror in many instances the same issues that drove them to impeach President Bill Clinton in 1999.

The star of this duplicitous comedy is Sen. Lindsey Graham.

Two decades ago, he was a House member from South Carolina. He “managed” the GOP impeachment effort on the floor of the House; Graham, after all, is a lawyer who at the time of President Clinton’s impeachment served as a judge advocate attorney in the U.S. Air Force Reserve.

He argued passionately that lying was an impeachable offense. Yes, the president committed perjury by swearing to tell a grand jury the truth, but then lied about his relationship with what’s-her-name.

The much younger Rep. Graham, though, took it farther. He said that efforts to block congressional inquiry into those matters were impeachable. Yes, he said that the Clinton team’s alleged effort to impede the congressional inquiry constituted a “high crime and misdemeanor” worthy of impeachment.

Isn’t that precisely what is happening now? Donald Trump has instructed his entire White House team to resist subpoenas being issued by various House committees. He even is seeking to block someone who no longer works in the White House — former WH counsel Don McGahn — from testifying. The president — to borrow a time-honored term born during the Watergate scandal of the 1970s — is “stonewalling” Congress on various matters that lawmakers deem important.

Where does Sen. Graham and most of his GOP colleagues stand on all of that?

Huh? Oh! The silence is deafening.