A week after the New Jersey congressman and longtime Democrat defected to the GOP in an Oval Office meeting where he pledged his “undying support” to President Donald Trump, the political apparatus of Van Drew’s new party is going to work for him. The president has endorsed Van Drew. A Trump-allied political action committee spent $250,000 on TV and digital ads supporting him. And the candidate who had formerly been seen as the Republican front-runner in the South Jersey district is shedding establishment support.