NASA and, more specifically, the Artemis return-to-the-moon program, has not yet become a partisan political issue for the 2020 presidential election. That might change if Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) becomes the Democratic nominee.

For those people who care about the Artemis program’s potential — to benefit the United States and the world — a Sanders presidency would be a gut punch.

“Bernie supports NASA’s mission and is generally in favor of increasing funding for NASA, but only after the needs of Americans on Earth are met first,” his campaign website states.

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Taking his agenda into context, the statement can be roughly translated into: Under a Sanders presidency, no space exploration will take place.

Sanders has some very ambitious plans to meet the needs of Americans on Earth first. His version of the Green New Deal, the plan to address climate change by remaking the American economy, is estimated to cost $16.4 trillion. “Medicare for all,” the Sanders plan to nationalize the American health-care system, would cost roughly $32.6 trillion over the first 10 years of its implementation.

Clearly, the imposition of such a vast obligation to the federal budget would likely preclude even the relatively modest increases of funding NASA would need to get Americans back to the moon and on to Mars. At best, the space agency would become a climate-change agency, such as proposed by Lori Garver, former deputy administrator of NASA.

Do not look to the private sector to take humans beyond low-Earth orbit under a Sanders presidency. The immense taxes that the Green New Deal and Medicare for all would need would fall heaviest on firms such as SpaceX and Blue Origin. Little money would be left over to fund private space exploration.

Since President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE warmly supports investments in space, a Sanders nomination for president by the Democratic Party would set up space exploration as a partisan issue. Even if, as is likely, Trump were to win the argument, the development would be a tragedy.

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NASA Administrator Jim Bridenstine James (Jim) Frederick BridenstineNASA publishes Artemis plan to land first woman, next man on moon NASA is in the market for moon rocks Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' MORE’s political vision for the Artemis program is to make support for the return to the moon bipartisan. In other words, in a perfect world, both Sen. Ted Cruz Rafael (Ted) Edward CruzCrenshaw looms large as Democrats look to flip Texas House seat SCOTUS confirmation in the last month of a close election? Ugly The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' MORE (R-Texas) and Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) would favor putting “the first woman and the next man” on the lunar surface by 2024. Bridenstine, by all accounts, is making good progress toward that goal. Even Nancy Pelosi has expressed support for the Artemis program. She is said to be quite enthusiastic about a woman exploring the moon’s surface.

A Sanders nomination has every potential to blow up that emerging consensus. If Trump and Sanders start to argue about the benefits of space exploration versus the Green New Deal, Republicans and Democrats would retreat to their corners and fight it out. Bipartisan support for space exploration would have to be rebuilt all over again after a Trump reelection. A Sanders election would mean the end of yet another plan to send humans to deep space, perhaps this time forever.

Ideally, deep space exploration should have the same political support as the International Space Station. During the late 1980s and early 1990s, the space station project endured numerous Democratic attempts to kill it. Now, the argument concerning ISS is not whether it should exist, but how long it should keep functioning. Bridenstine’s goal is for the same attitude to exist for Artemis.

Sanders, incidentally, does not like the idea of “militarizing space,” i.e. the Space Force. “Bernie is against militarizing space and wants to prioritize domestic spending,” according to his campaign.

However, Russia and China are already militarizing space, creating weapons systems to strike at America’s space assets. Sanders would likely end the effort to create a United States Space Force, making a space version of Pearl Harbor more likely. An enemy strike on American GPS, communications, and reconnaissance satellites would wreck the American military’s ability to wage war and the American economy to function. America might not survive as a functioning civilization.

The other Democratic candidates should take note and resist the temptation to attack Trump’s space policy just because they loathe the president. Some things are too important to be part of a political war.

Mark R. Whittington is the author of space exploration studies “Why is It So Hard to Go Back to the Moon? as well as “The Moon, Mars and Beyond.”