Critics say the administration is breaking the law and sidestepping the rulemaking process that presidents of both parties have routinely followed.At the Transportation Department, enforcement of pipeline safety rules has plunged to unprecedented lows since President Donald Trump’s inauguration.Trump recently ordered Energy Department staff to stop enforcing water conservation standards for showerheads and other household appliances. And at one Labor Department division, his appointees have instructed employees to halt most work related to antidiscrimination laws.Across the government, the Trump administration is trying a new tactic for gutting federal rules and policies that the president dislikes: simply stop enforcing them.“The conscious...