Former Homeland Security Secretary Jeh Johnson will testify Wednesday before the House Intelligence Committee as part of its ongoing probe into Russia’s interference in the 2016 elections.

Johnson’s testimony is expected to begin around 10 a.m. EDT. Watch live in the player above.

Johnson, who served from 2013 to 2017 under former President Barack Obama, met with the Senate Intelligence Committee last week behind closed doors. In Wednesday’s hearing before the House, Johnson will likely face questions about his agency’s reports about Russia’s hacking leading up to the 2016 election and before Inauguration Day, and about whether those assessments have changed.

The House and Senate intelligence committees are separately investigating Russia’s meddling in the 2016 election, as well as possible ties to President Donald Trump’s campaign. Special counsel Robert Mueller has stepped in to lead the FBI’s investigation, following Comey’s firing May 9.

A number of high-profile officials — including former FBI Director James Comey and Attorney General Jeff Sessions — have publicly testified in recent weeks.

Read Jeh Johnson’s prepared testimony on Russia

Trump criticized allegations about his campaign’s ties to Russia on Twitter last week, calling them a “witch hunt.”

I am being investigated for firing the FBI Director by the man who told me to fire the FBI Director! Witch Hunt — Donald J. Trump (@realDonaldTrump) June 16, 2017

Despite the phony Witch Hunt going on in America, the economic & jobs numbers are great. Regulations way down, jobs and enthusiasm way up! — Donald J. Trump (@realDonaldTrump) June 16, 2017

The Washington Post reported late Friday that Mueller was investigating Trump for obstruction of justice. Trump’s lawyer told the New York Times the president was not under investigation.

PBS NewsHour will update this story as it develops.