Trump cited commentary from Fox Business News anchor Maria Bartiromo, who pointed to the drag from European Union tariffs as a key factor in falling sales by the iconic US motorcycle maker.
“So unfair to U.S.,” Trump said on Twitter. “We will reciprocate.”
The commentary was a pivot of sorts from the US president, in targeting Brussels rather than Wisconsin-based Harley.
He previously lashed out at the 116-year-old company after it announced plans last summer to shift some US manufacturing overseas as a way to circumvent the EU tariffs, which were imposed on key American goods in March 2018 in retaliation for Trump’s tariffs on steel and aluminium.
Trump’s latest threat comes as Washington and Brussels are close to the start of formal trade talks, now that the US leader has moved closer to settling a months-long fight with China.
Harley-Davidson reported a $21 million hit from tariffs in the first quarter, which contributed to the 26.8% drop in profits to $127.9 million amid lower revenues.
In June, Harley-Davidson announced it was shifting some manufacturing capacity overseas as “the only sustainable option” following punitive import duties of 31 percent in the EU.
The motorcycle manufacturer in January 2018 announced it would close a Missouri factory and consolidate jobs into Pennsylvania at the same time it was building a new factory in Thailand.
The Thailand operation is part of Harley’s “tariff mitigation” strategy aimed at the growing Southeast Asian market, the company said.
“We’re acting with agility and discipline to take full advantage of rapidly evolving global markets,” Chief Executive Matt Levatich said.
Harley also is focused on building up a new generation of riders to make up for declines in the older population that has been its bedrock.
The company said it found 278,000 “new riders” in the US in 2018 and that “this group is the most diverse across age, ethnicity and gender in all the years Harley-Davidson has tracked this data.”
Shares of Harley-Davidson fell 2.1% to $38.90 in pre-market trading, but was down just 0.35 percent in early trading.