Small business owners worry that mounting economic uncertainty, driven largely by President Trump's shifting tariff policies, could shut their doors for good. Beth Benike, cofounder of Busy Baby, told CBS MoneyWatch that a lack of clarity on the direction of U.S. tariffs poses serious problems for the Oronoco, Minnesota-based retailer.

The chief economist at the National Federation of Independent Businesses wondered if there was an economic iceberg looming, as its March survey of U.S. entrepreneurs showed a fourth straight month of declining confidence.

The mood of small business owners is worsening but remains better than it was over most of the last several years. The Federation of Independent Business’ optimism index for