House Republicans are pushing to ease proposed government regulations for companies that sell e-cigarettes and other new tobacco products, a move that Democrats charge could lead to unsafe products on the market.

A spending bill approved by a House subcommittee Thursday would prevent the FDA from requiring pre-market reviews of e-cigarettes that already are on the market.

As part of a broader rule regulating e-cigarettes for the first time, the agency has proposed that e-cigarette brands marketed since February 2007 undergo those pre-market reviews retroactively once the final rule is approved.

Companies would have to submit the applications within two years of the final rule, and then the FDA would ensure that the product is “appropriate for the protection of the public health.” If not, the agency could take it off the market.