E-cigarette maker Juul is ramping up its Washington lobbying operation as it tries to head off potential regulatory threats from the Trump administration and Congress.

The company has been under scrutiny from Food and Drug Administration (FDA) regulators and lawmakers from both parties amid a massive surge in popularity for its products among teens. Juul says e-cigarettes provide a healthier alternative for adult smokers and are an important tool to help wean them off traditional tobacco products. [...]