You mentioning "the two rich white guys" made me think about demographics of some of these people in the context of Yglesias' comment I quoted downthread.

All info. below from Wikipedia. All "white males" (unless having some Jewish background disqualifies from that category?). All alike HOW EXACTLY? WHAT COMMUNITY?

Because Yglesias has paternal grandfather of Spanish-Cuban background, and his three other grandparents were of Eastern European Jewish descent. He was sent to fancy private schools on the upper east side and then went to Harvard. 

Tom Steyer

...Steyer was born in Manhattan.[10] His mother, Marnie (née Fahr) was a teacher of remedial reading at the Brooklyn House of Detention and his father, Roy Henry Steyer was a partner in the New York law firm of Sullivan & Cromwell,[11][12] and was a prosecutor at the Nuremberg Trials.[13] His father was a non-practicing Jew, and his mother was Episcopalian.[10]

Steyer grew up on the Upper East Side of Manhattan, and attended the Buckley School and Phillips Exeter Academy.[10] He graduated from Yale University summa cum laude in economics and political science, and was elected to Phi Beta Kappa. He was captain of the soccer team. Steyer received his MBA from Stanford Graduate School of Business, where he was an Arjay Miller Scholar.[10][14] He has served on the Stanford University board of trustees.[4]...

Michael Bloomberg

....born...in the Brighton neighborhood of Boston, to William Henry Bloomberg (1906–1963), a bookkeeper for a dairy company,[7] and Charlotte (née Rubens) Bloomberg (1909–2011).[8][9] The Bloomberg Center at the Harvard Business School was named in William Henry's honor.[10][11] Bloomberg's family is Jewish, and he is a member of the Temple Emanu-El in Manhattan.[12] Bloomberg's paternal grandfather, Rabbi Alexander "Elick" Bloomberg, was a Polish Jew.[13][14] Bloomberg's maternal grandfather, Max Rubens, was a Lithuanian Jewish immigrant from present-day Belarus,[15][16] and his maternal grandmother was born in New York to Lithuanian Jewish parents.

The family lived in Allston until Bloomberg was two years old, followed by Brookline, Massachusetts, for two years, finally settling in the Boston suburb of Medford, Massachusetts, where he lived until after he graduated from college.[17]

Bloomberg is an Eagle Scout.[18][19] He graduated from Medford High School in 1960.[20] He went on to attend Johns Hopkins University, where he joined the fraternity Phi Kappa Psi...He graduated in 1964 with a Bachelor of Science degree in electrical engineering.[23] In 1966, he graduated from Harvard Business School with a Master of Business Administration (MBA) degree....

Bernie Sanders

.... born....in the Brooklyn borough of New York City.[7] His father, Elias Ben Yehuda Sanders,[8] was born in Słopnice, Galicia, in Austria-Hungary (now part of Poland),[9][10] to a Jewish working-class family. In 1921, Elias immigrated to the United States, where he became a paint salesman.[9][11][12] Bernard's mother, Dorothy Sanders (née Glassberg), was born in New York City[13][14] to Jewish immigrant parents from Radzyń Podlaski, in modern-day eastern Poland, and with roots in Russia.[15][16]

Sanders became interested in politics at an early age. He said, "A guy named Adolf Hitler won an election in 1932.[c] He won an election, and 50 million people died as a result of that election in World War II, including six million Jews. So what I learned as a little kid is that politics is, in fact, very important."[19] In the 1940s, many of his relatives in German-occupied Poland were murdered in the Holocaust.[8][14][20]

Sanders lived in Midwood, Brooklyn.[7] He attended elementary school at P.S. 197, where he won a borough championship on the basketball team.[21][22] He attended Hebrew school in the afternoons, and celebrated his bar mitzvah in 1954.[20] His older brother, Larry, said that during their childhood, the family never lacked for food or clothing, but major purchases, "like curtains or a rug," were not affordable.[23]

Sanders attended James Madison High School, where he was captain of the track team and took third place in the New York City indoor one-mile race.[21] In high school, he lost his first election, finishing last out of three candidates for the student body presidency with a campaign that focused on aiding Korean War orphans. Despite the loss he became active in his school's fundraising activities for Korean orphans, including organizing a charity basketball game.[24] Not long after his high school graduation, his mother died at the age of 46.[14][20] His father died a few years later in 1962, at the age of 57.[10]

Sanders studied at Brooklyn College for a year in 1959–1960[25] before transferring to the University of Chicago and graduating with a bachelor of arts degree in political science in 1964.[25] He has described himself as a mediocre college student because the classroom was "boring and irrelevant," while the community was more important to his education.[26]....

Joe Biden

....born....in Scranton, Pennsylvania,[4]:5 to Catherine Eugenia "Jean" Biden (née Finnegan) and Joseph Robinette Biden Sr.[5][6] The oldest child in a Catholic family, he has a sister, Valerie, and two brothers, Francis and James.[4]:9 Jean was of Irish descent,[7][8][4]:8 while Joseph Sr. had English, French, and Irish ancestry.[9][4]:8

Biden's father was initially wealthy but suffered several financial setbacks around the time Biden was born,[10][11][12] and for several years the family lived with Biden's maternal grandparents.[13] Scranton fell into economic decline during the 1950s and Biden's father could not find steady work.[14] Beginning in 1953, the family lived in an apartment in Claymont, Delaware, then moved to a house in Wilmington, Delaware.[13] Biden Sr. later became a successful used car salesman, maintaining the family in a middle-class lifestyle.[13][14][15]

At Archmere Academy in Claymont,[4]:27, 32 Biden was a standout halfback and wide receiver on the high school football team;[13][16] he also played baseball.[13] Though a poor student, he was class president in his junior and senior years.[4]:40–41[17]:99 He graduated in 1961.[4]:40–41

At the University of Delaware in Newark, Biden briefly played freshman football[18][19] and earned a Bachelor of Arts degree in 1965 with a double major in history and political science, and a minor in English.[20][17]:98 He had a C average and ranked 506th in his class of 688.[21][22]

Biden has a stutter, which has improved since his early twenties.[23] He says he has reduced it by reciting poetry before a mirror,[17]:99[24] ....