Millennial candidates could change the age makeup of Congress, currently one of the oldest ever.

With an average age of 58 in the House and 62 in the Senate, this Congress is the oldest of any in recent history, according to a report by Congressional Research Service.

But that could change come November. Nearly 20 millennials — generally considered those born sometime between the early 80s and early 00s — won races in last week’s primaries, according to the Millennial Action Project, a generational organization combating political polarization. Thirteen more, almost evenly split between Democrats and Republicans, will be up for a vote Tuesday.

Read the rest of the article at RollCall.com.