Rubbish Check
Newsweek · 25 October 2026
source“Trump Claims His Uncle ‘Invented Radar’: What The Record Shows”
R2/ 10
Lightly altered
Rubbish Rating — 1 = base fact, 10 = pure rubbish
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In short
Rubbish Talk rates Newsweek's headline on Trump's claim that his uncle "invented radar" a 2/10 because the headline accurately flags the claim as disputed and the body correctly debunks it using the historical record.
The Verdict
Lightly altered, barely. The headline frames Trump's quote as a claim to be checked rather than stating it as fact, and the article delivers exactly what it promises: a clean debunk backed by the real history of radar's invention and an honest account of what Trump's uncle actually did. The only reason this isn't a flat R1 is the headline's slight softness ("what the record shows" rather than a more direct "false") leaves a sliver of ambiguity before the reader clicks through.
What actually happened
President Trump told reporters in Palm Beach on October 24 that "my uncle invented radar," referring to Dr John Trump, an MIT electrical engineer. The claim is false: radar had multiple inventors predating Dr Trump's involvement, though he did play a significant wartime role in U.S. radar research and development.
Key facts
- Heinrich Hertz proved the existence of electromagnetic waves in experiments between 1886 and 1889, and in 1904 Christian Hulsmeyer patented a ship-detecting radio device widely seen as an early form of radar.
- In 1935 Robert Watson-Watt produced a device that could consistently locate aircraft, leading to the Chain Home radar network credited with helping defend Britain during the 1940 Battle of Britain.
- Dr John Trump joined the newly formed National Defense Research Committee in 1940 as technical aide to Karl Compton, President of MIT and Chairman of the Radar Division, and in 1942 became Secretary of the Microwave Committee, a sub-committee of the NDRC, which oversaw the MIT Radiation Laboratory's radar work.
- An X community note on the viral clip stated plainly that "Donald Trump's uncle did not invent radar. The 'first practical radar system' was patented by Sir Robert Watson-Watt, who built on the work of others such as Heinrich Hertz and Christian Huelsmeyer."
- Even Watson-Watt, the figure most associated with radar's invention, rejected sole credit, writing in his 1958 memoir that it had "become habitual to call me 'the father of radar'" while describing a "cluttered" genealogy of contributors.
- Trump has made a similar unverified claim about this uncle before, telling a Pennsylvania crowd his uncle taught Ted Kaczynski at MIT, a claim MIT said it has no record of, and which is also undercut by Dr Trump dying in 1985, 11 years before Kaczynski's 1996 arrest.
What to watch for
Watch whether Trump repeats the "invented radar" line at future rallies despite the community-note correction and MIT's own public profile of Dr Trump's actual, more modest role. If so, expect follow-up fact-checks to track it as a recurring, debunked talking point rather than a one-off gaffe.
About this scoreThe R-Score is Rubbish Talk's editorial opinion on how far a headline's framing sits from what the underlying facts support. It is a judgement about presentation and emphasis, not an allegation that any outlet has acted dishonestly. Every figure we rely on is linked under Receipts so you can check it yourself.
