It has not been a good day for Google after it was hit with a record-breaking fine totaling $5 billion or €4.3 billion by the European Commission in relation to Android and the way the company uses its position to bundle search and Chrome with handsets throughout the continent.
Trump took to Twitter over the decision: "I told you so!"
It is likely to stoke tensions between Europe and the USA, which regulates the tech industry with a lighter hand and has complained that the European Union is singling out American companies for punishment.
Google has said it will appeal the decision - the latest in a series of actions against the company.
Democratic Sen. Richard Blumenthal of CT tweeted that the fine should "be a wake-up call" to the Federal Trade Commission and "should lead United States enforcers to protect consumers".
It nearly doubles the €2.42b - about Dollars $2.8b - that the European Union levied against the company past year over promoting its own shopping comparison service at the top of its search results. The decision ignores the fact that Android phones compete with iOS phones, something that 89 percent of respondents to the Commission's own market survey confirmed, ' argues chief executive Sundar Pichai in a blog post entitled Android has created more choice, not less.
Vestager, who has taken on a string of Silicon Valley titans as European Union antitrust chief, said Google "must put an effective end to this conduct within 90 days or face penalty payments" of up to five percent of its average daily turnover.
Google provides Android free to smartphone manufacturers and generates most of its revenue from selling advertisements that appear along with search results.
"If phone makers and mobile network operators couldn't include our apps on their wide range of devices, it would upset the balance of the Android ecosystem".
The Commission opened its investigation into Android following a 2013 complaint from lobbying group FairSearch, which was backed by competitors including Oracle, Nokia and Microsoft.
It represents just over two weeks of revenue for Google parent Alphabet and would scarcely dent its cash reserves of $102.9 billion.
European Union antitrust chief Margrethe Vestager said she very much liked the USA, countering a reported remark by President Donald Trump that she "hated" the country.