Unless you’ve been under a rock lately, you probably know the U.S. Senate is hearing only the third impeachment trial of an American president in history.

What you may not know is that, even though the GOP-controlled Senate makes removing President Donald Trump unlikely, it's not impossible. Just unlikely.

The Associated Press has created a handy impeachment tracker, so readers can view how all 100 senators are leaning in the president’s trial, now being conducted under the bright spotlight that only a democratic republic can provide.

The impeachment tracker was also active during House Democrat-led impeachment proceedings in December.

»How to contact your Georgia congress members on impeachment

The U.S. Constitution requires a two-thirds majority in the Senate (or 67 senators) to convict in an impeachment trial.

Republicans hold 53 seats in the Senate, while Democrats hold 45. However, two Independents — including presidential candidate Bernie Sanders of Vermont — regularly caucus with Democrats, giving the nation’s blue party 47 votes.

If the Senate votes along party lines regarding impeachment — as did the House — 20 Republican senators would have to join Democrats in voting to remove the nation's 45th president from office.