A vulnerable Republican congressman who has not voted in weeks “is attending to a personal health matter”, the speaker of the House, Mike Johnson, said on Friday as he struggles to maintain his historically small majority in Congress’s lower chamber. Tom Kean Jr’s New Jersey district is a top pickup target for Democrats in the November midterms, but the congressman has not cast a vote in the House since 5 March. In a statement, Johnson said he had spoken to Kean, 57, on Thursday by phone, and said “he is attending to a personal health matter and expects to be back to 100% very soon. Tom is one of the most dedicated and hardest-working members of Congress, and I am grateful for all he does and will continue to do to serve New Jerseyans and our country.” Harrison Neely, a spokesman for Kean’s campaign, said: “The congressman is handling a personal health matter. He will be 100% healthy and back to a full schedule soon.” He did not respond to specific questions about Kean’s health and when he stopped working.…