With the second round of Democratic primary debates in the books, the focus now turns to September’s third round in Houston — but many of the White House hopefuls who took the stage on Tuesday and Wednesday night have likely reached the end of the road.

Under strict polling and fundraising thresholds implemented by the Democratic National Committee to whittle down the overstuffed field, only seven of the 20 candidates who took the stage in Detroit currently have an invite to Space City.

Candidates have until Aug. 28 to both receive contributions from at least 130,000 unique donors and crack 2 percent in at least four major polls.

Those who have already punched their tickets to Houston are front-running former Vice President Joe Biden, Massachusetts Sen. Elizabeth Warren, Vermont Sen. Bernie Sanders, California Sen. Kamala Harris, New Jersey Sen. Cory Booker, South Bend, Indiana, Mayor Pete Buttigieg and former Texas Rep. Beto O’Rourke.

Three other candidates are knocking on the door, having already fulfilled one of the two criteria: Former Housing Secretary Julián Castro and outsider businessman Andrew Yang have garnered enough donations, while Minnesota Sen. Amy Klobuchar has ranked highly enough in polling.

Assuming all three of them can make it, that still leaves 10 candidates who participated in the second round on the outside looking in.

Notable names currently among those unlucky 10 include out-there social-media darling Marianne Williamson, fiery Hawaii Rep. Tulsi Gabbard, and a pair of New York politicians, Sen. Kirsten Gillibrand and Big Apple Mayor Bill de Blasio.

Though any candidates who fail to qualify for Texas can, of course, forge ahead with their campaigns, they will do so without critical prime-time exposure to millions of potential voters.

Depending on how many candidates ultimately make the cut, the Houston leg will unfold over either one or two nights in September.