A source told the Globe that Lynch will challenge .
Markey recently announced he was running for the seat. Lynch plans to formally announce his plans after Kerry’s expected confirmation.
Kerry received a warm welcome during his Thursday, Jan. 24 confirmation hearing with he Senate Foreign Relations Committee and will likely be confirmed, according to the Washington Post.
Lynch represents 21 communities, including Boston, Braintree, Hingham, Canton, Stoughton, Norwood and Milton. Markey, who has served in the Congress since 1976, represents Waltham, among other communities