Mr. and Mrs. Clinton first met in 1970 at the library of Yale University’s law school.

Mr. and Mrs. Clinton first met in 1970 at the library of Yale University’s law school.

Four decades of standing side by side with Hillary Clinton and her husband

Before the wedding announcement ceremony with friends, the two held a small wedding party at their home on October 11, 1975 with the attendance of 15 guests.

On the 40th wedding anniversary last year, former US president Bill Clinton posted a wedding photo of him and Hillary on his Twitter account and wrote: `It seems like just yesterday.`

Before the wedding announcement ceremony with friends, the two held a small wedding party at their home on October 11, 1975 with the attendance of 15 guests.

On the 40th wedding anniversary last year, former US president Bill Clinton posted a wedding photo of him and Hillary on his Twitter account and wrote: `It seems like just yesterday.`

Four decades of standing side by side with Hillary Clinton and her husband

Mr. and Mrs. Clinton welcomed their first daughter, Chelsea Clinton, on February 27, 1980 in Little Rock, Arkansas.

Mr. and Mrs. Clinton welcomed their first daughter, Chelsea Clinton, on February 27, 1980 in Little Rock, Arkansas.

Four decades of standing side by side with Hillary Clinton and her husband

The couple celebrates Mr. Bill’s victory in the Democratic Party race on June 8, 1982.

The couple celebrates Mr. Bill’s victory in the Democratic Party race on June 8, 1982.

Four decades of standing side by side with Hillary Clinton and her husband

They held hands to congratulate when Mr. Bill took office as governor of Arkansas on September 20, 1991.

They held hands to congratulate when Mr. Bill took office as governor of Arkansas on September 20, 1991.

Four decades of standing side by side with Hillary Clinton and her husband

On November 3, 1991, Hillary and her daughter came to support Bill’s US presidential campaign.

On November 3, 1991, Hillary and her daughter came to support Bill’s US presidential campaign.

Four decades of standing side by side with Hillary Clinton and her husband

Mrs. Hillary and her husband went to Chicago to call on people to support Mr. Bill in the race for the White House in 1992. In the photo, the two are beaming in the stands after Mr. Bill’s speech at a hotel in

Mrs. Hillary and her husband went to Chicago to call on people to support Mr. Bill in the race for the White House in 1992. In the photo, the two are beaming in the stands after Mr. Bill’s speech at a hotel in

Four decades of standing side by side with Hillary Clinton and her husband

Mr. Bill with First Lady Hillary Rodham Clinton at the US presidential inauguration ceremony on January 20, 1993.

Mr. Bill with First Lady Hillary Rodham Clinton at the US presidential inauguration ceremony on January 20, 1993.

Four decades of standing side by side with Hillary Clinton and her husband

The Clinton family gathered at Chelsea’s high school graduation ceremony at Sidwell Friends School in Washington in 1997. Mr. Bill choked up and told his daughter with pride: `We want to hug you again.`

The Clinton family gathered at Chelsea’s high school graduation ceremony at Sidwell Friends School in Washington in 1997. Mr. Bill choked up and told his daughter with pride: `We want to hug you again.`

Four decades of standing side by side with Hillary Clinton and her husband

Hillary stood looking at her husband as Bill denied the sexual scandal between him and White House intern Monica Lewinsky in front of the media on January 26, 1998.

`I never had sex with that woman,` he affirmed.

Hillary stood looking at her husband as Bill denied the sexual scandal between him and White House intern Monica Lewinsky in front of the media on January 26, 1998.

`I never had sex with that woman,` he affirmed.

Four decades of standing side by side with Hillary Clinton and her husband

Ignoring all of Mr. Bill’s mistakes in the past, Hillary continued her life with her husband and daughter.

In July 2010, Chelsea married businessman Marc Mezvinsky in New York.

Ignoring all of Mr. Bill’s mistakes in the past, Hillary continued her life with her husband and daughter.

In July 2010, Chelsea married businessman Marc Mezvinsky in New York.

Four decades of standing side by side with Hillary Clinton and her husband

On the day Hillary launched her presidential campaign in Manhattan on June 13, 2015, Mr. Bill also came to cheer his wife’s spirit.

On the day Hillary launched her presidential campaign in Manhattan on June 13, 2015, Mr. Bill also came to cheer his wife’s spirit.

Four decades of standing side by side with Hillary Clinton and her husband

On the evening of July 26, at the Democratic Party convention, Hillary was officially selected to become the first woman in history to lead a major political party to run for president of the United States next November. At the event

Mrs. Clinton is `the best change-maker I have ever met in my entire life,` he said.

See more: Former US President Bill Clinton talks about the first days of falling in love with Hillary

On the evening of July 26, at the Democratic Party convention, Hillary was officially selected to become the first woman in history to lead a major political party to run for president of the United States next November. At the event

Mrs. Clinton is `the best change-maker I have ever met in my entire life,` he said.

See more: Former US President Bill Clinton talks about the first days of falling in love with Hillary

Kim Dung