Source: POLITICO' S MORNING AGRICULTURE, 9/6/19

If negotiations get off the ground between the U.S. and a post-Brexit Britain, one agriculture issue in particular could ruffle the feathers of both countries: poultry. "We're not too keen on that chlorinated chicken," Johnson told Pence during his visit to Downing Street on Thursday.

The comments refer to the American practice of washing chicken carcasses with chemicals to kill pathogens, such as salmonella and E. coli. The process, known as "pathogen reduction treatment," is banned in the EU and has long been a slippery trade issue. Pence, during his dinner remarks later in the day, acknowledged that chlorinated chicken would be the subject of "some pretty tough discussions."

'Haggis from Scotland': Johnson also emphasized a desire to free up the U.S. market to British exports, noting that Americans "don't eat any British lamb or beef or haggis from Scotland." Haggis, the national dish of Scotland, is a pudding typically made from sheeps' heart, liver and lungs.

The never-ending Brexit dilemma: Johnson, who promised to pull the U.K. out of the EU by Oct. 31, has faced a string of defeats this week, including losing his one-seat majority in Parliament. Johnson is now calling for a snap election to try to once again form a majority that could support his Brexit plan.