Rep. Jamie Raskin announced he has a 'serious but curable' form of cancer on Wednesday.
In a statement, Raskin, 60, said he had recently been diagnosed with Diffuse Large B Cell Lymphoma and would soon begin chemotherapy.
The Maryland Democrat was the lead impeachment manager for former President Donald Trump's second impeachment in the House and was central to the January 6th committee's investigation into the Capitol attack.
'Prognosis for people in my situation is excellent after four months of treatment,' he said in the statement. 'I expect to be able to work through this period but have been cautioned by my doctors to reduce unnecessary exposure to Covid-19, the flu and other viruses.'
In a statement Raskin said he had recently been diagnosed with Diffuse Large B Cell Lymphoma and would soon begin chemotherapy
'Prognosis for people in my situation is excellent after four months of treatment,' he said in the statement
'I plan to get through this, and, in the meantime, to keep making progress every day in Congress for American democracy.'
Raskin was elected as ranking member of the powerful House Oversight Committee last week, where he'll be Democrats' leading defense against Republicans' planned probes into the Biden family and the Biden administration once the GOP takes control of the House in early January.
He is set to take the place of Rep. Carolyn Maloney, who didn't survive a Democratic primary against Rep. Jerry Nadler when their New York districts were combined.
Maloney took over control of the Oversight Committee after the death of longtime Democratic Rep. Elijah Cummings in 2019.
According to the American Cancer Society, diffuse large B cell lymphoma is fast-growing but responds well to treatment.
Overall, about 3 out of 4 people will have no signs of disease after the initial treatment, and many are cured,' according to the group's website.
Raskin is also a colon cancer survivor - he was diagnosed in 2010.