Rep. Jerrold Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.), the chairman of the House Judiciary Committee, will miss the final procedural step in the impeachment process before the House casts a final vote as he tends to a family emergency.

Two Democratic sources told The Hill that Nadler is away from Congress on Tuesday because his wife is ill.

Nadler’s absence comes the same day as the House Rules Committee is scheduled to set the terms of the chamber’s floor debate on voting on two articles of impeachment against President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE.

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The whole chamber is expected to cast a final vote on the articles Wednesday. They are expected to pass along a roughly party-line vote with possibly a handful of Democratic defections.

The New York Democrat is anticipated to return to Washington late Tuesday or early Wednesday, according to Politico. Rep. Jaime Raskin (D-Md.), another member of the Judiciary panel, is expected to present the articles of impeachment to the Rules Committee.

The two articles of impeachment center around abuse of power over Trump’s pressuring of Ukraine to investigate former Vice President Joe Biden Joe BidenBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Joe Biden should enact critical government reforms if he wins MORE, a chief political rival, and obstruction of Congress over his commands to administration officials to defy congressional subpoenas for testimony and documents.

Scott Wong contributed to this report.