"In "22 we"re going to net-lose governorships, we"re not going to pick up the number of seats in the House that we thought, and we may not win the Senate despite a president who has 40% job approval," said Chris Christie, the former New Jersey governor who ran against - and later endorsed - Mr Trump for president in 2016. "There"s only one person to blame for that, and that"s Donald Trump."