With airlines threatening to lay off thousands of workers, this week could be pivotal if there is going to be a pre-election deal on another major coronavirus relief package.

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U.S. farmers and ranchers will have to wait longer for the expected surge of Chinese purchases agreed to under the "phase one" trade deal as the country grapples with trying to stop the spread of the coronavirus, National Economic Council Director Larry Kudlow said Tuesday.

Farmers were hoping for a speedy resolution to the U.S.-China trade war, but the lack of such a resolution has sent them scrambling to come up with a new home for exports once gobbled up by China.

China, in retaliation for new U.S. tariffs, revoked its latest goodwill gesture of exempting some Chinese importers from its own tariffs on U.S. soybeans, but at least one U.S. shipment will get through unscathed, according to U.S. government and industry officials.

National Economic Council Director Larry Kudlow said Monday he expects China to drop its retaliatory tariffs on U.S. ag commodities very soon in order to boost imports, as promised.

Prospects for U.S. farm exports can change suddenly and dramatically. Breaking into foreign markets takes decades of persistent hard work and hefty investments in building infrastructure, relationships and, ultimately, sales.