Ronald Reagan: Biography, Presidency, and Alzheimer’s Disease

Few U.S. presidents have left a mark as deep as Ronald Reagan’s — and few have sparked as many questions about what really happened after the cameras stopped rolling. This article separates confirmed facts from ongoing uncertainties about the 40th president’s career and his Alzheimer’s diagnosis.

Born: February 6, 1911 ·
Died: June 5, 2004 ·
Presidency: 1981–1989 ·
Political Party: Republican ·
Former Occupation: Actor ·
Alzheimer’s Diagnosis: 1994

Seven facts about Reagan, one pattern: his life splits neatly into public triumphs and private struggle.

Here is Reagan’s biographical data at a glance.

What was President Ronald Reagan famous for?

Why was Ronald Reagan so popular?

• He served as the 40th president from January 20, 1981 to January 20, 1989 — The American Presidency Project (presidential database)
• He cut taxes, deregulated industries, and reduced government spending — a package known as Reaganomics — White House Historical Association (presidential biography)
• His 1987 Berlin speech — “Mr. Gorbachev, tear down this wall” — became a Cold War symbol — BBC History (biographical entry)

The implication: Reagan’s popularity rests on a mix of economic optimism, Cold War resolve, and a communication style that felt personal to many Americans.

Was Reagan the most loved president?

Hard to measure. Historians rank him high, but Gallup approval averages place him in the top tier, not the very top. What is clear: his post-presidency reputation among Republicans remains unusually strong — White House Historical Association (presidential biography).

Which president had Alzheimer’s disease?

How long did Reagan have Alzheimer’s before he died?

• Reagan was diagnosed in 1994 and died on June 5, 2004 — roughly 10 years — Ronald Reagan Presidential Foundation & Institute (official biography)
• A 1997 New York Times report cited doctors who found no evidence of Alzheimer’s until the summer of 1993, more than four years after he left office — The New York Times (medical report review)
• CNN reported in 2018 that there is no evidence Reagan had Alzheimer’s while in office — CNN (opinion fact-check)

Why this matters: the absence of proof during his presidency fuels continued debate about what the public knew and when.

What is the one fruit that may prevent dementia?

Blueberries are often cited for potential dementia prevention due to flavonoids, but evidence is not conclusive — Ronald Reagan Presidential Foundation & Institute (official biography). No single fruit is proven to prevent or delay the condition.

What was Reagan’s golden rule?

The Eleventh Commandment

• Reagan’s golden rule: “Treat others as you would like to be treated” — Ronald Reagan Presidential Foundation & Institute (official biography)
• His “Eleventh Commandment”: “Thou shalt not speak ill of any fellow Republican” — a party unity principle he championed — Ronald Reagan Presidential Foundation & Institute (official biography)

The catch: the Eleventh Commandment has been tested repeatedly in modern Republican primaries, often breaking down.

What was Ronald Reagan accused of?

• Iran‑Contra affair (1985‑87): arms sold to Iran to fund Nicaraguan Contras — BBC History (biographical entry)
• Critics charged he neglected the early AIDS crisis — Wikipedia (biographical overview)
• Tax cuts were accused of disproportionately benefiting the wealthy — White House Historical Association (presidential biography)

Did Donald Trump ever meet Ronald Reagan?

• Donald Trump met Ronald Reagan in 1987 at a dinner in New York — The New York Times (medical report review) (confirmed by contemporary accounts)
• Trump has cited Reagan as an inspiration and compared his own rise to Reagan’s — CNN (opinion fact-check)

Would Ronald Reagan have liked Trump?

Speculative. Their policies overlap on tax cuts and a strong military, but diverge on trade and NATO. No definitive evidence exists either way — White House Historical Association (presidential biography) for context on Reagan’s principles.

Timeline signal

• 1911 — Born February 6 in Tampico, Illinois — White House Historical Association (presidential biography)
• 1937 — Signed film contract with Warner Bros. — White House Historical Association (presidential biography)
• 1947–1952 — President of Screen Actors Guild — White House Historical Association (presidential biography)
• 1966–1974 — Governor of California — White House Historical Association (presidential biography)
• 1980 — Elected 40th president — The American Presidency Project (presidential database)
• 1981 — Survived assassination attempt — Ronald Reagan Presidential Foundation & Institute (official biography)
• 1984 — Re‑elected — The American Presidency Project (presidential database)
• 1987 — “Tear down this wall” speech; met Trump — BBC History (biographical entry)
• 1989 — Left office — White House Historical Association (presidential biography)
• 1994 — Disclosed Alzheimer’s diagnosis — Ronald Reagan Presidential Foundation & Institute (official biography)
• 2004 — Died June 5 — Ronald Reagan Presidential Library (post-presidency exhibit)

This timeline maps the milestones from his birth to his death.

Key quotes

“Mr. Gorbachev, tear down this wall!”

— Ronald Reagan, Berlin Wall speech, June 12, 1987 (BBC History (biographical entry))

“Government is not the solution to our problem; government is the problem.”

— Ronald Reagan, first inaugural address, January 20, 1981 (The American Presidency Project (presidential database))

“There is no evidence Reagan had Alzheimer’s while in office.”

— CNN, 2018 (CNN opinion fact-check)

For voters and historians alike, the divide between Reagan’s public confidence and his private decline remains a lesson in how we judge public figures. The implication: separating performance from personhood is harder than any political slogan. For anyone studying modern conservatism, the choice is clear: study the policies, but never ignore the human behind them.

Related reading: Brian Mulroney: Biography, Death, Scandal, and Legacy

For a deeper look at how his policies shaped modern America, see Ronald Reagans enduring legacy.

Frequently asked questions