The New Jersey governor on Friday backed the abrasive mogul's Republican presidential bid. In the following days, Christie's approval rating among registered New Jersey voters dipped by 6 percent, according to a Fairleigh Dickinson University poll released Wednesday.
Overall, Christie's approval rating in the survey conducted from Feb. 24-28 hit 30 percent, matching a low reached in June 2015. Before the endorsement, 33 percent of respondents said they approved of Christie, but only 27 percent did after he backed Trump.
Backing Trump — and leaving the state for extended periods of time — are not the only drivers of Christie's low approval, noted Krista Jenkins, a Fairleigh Dickinson political science professor and director of PublicMind. However, the decision certainly does not help the governor at a time when many voters have grown disillusioned with his policies, she said.
"In the absence of any change, it may not get better for him," Jenkins said.
New Jersey voters remain critical of Christie on transportation funding, the public pension system and taxation, among other issues, Jenkins added. Six New Jersey newspapers also demanded in a joint editorial Tuesday that Christie resign because of his support for Trump.
Trump, for his part, enjoyed seven GOP state election wins on Super Tuesday. Christie became a topic of Internet conversation for his facial expressions as he stood behind Trump at a Tuesday night press conference.
The Fairleigh Dickinson survey included 694 self-identified registered voters in New Jersey.
Christie's office did not immediately respond to a request for comment.