Rodents may have never stopped a New York City subway, but they did delay a much bigger journey slated for Tuesday.

On Monday, NASA was loading up a SpaceX mission to resupply the International Space Station when it says it found a Houston-level problem: The bars being packed to feed the station's mice were moldy. That led NASA to officially move the space station's delivery to Wednesday afternoon.

NASA is usually a pretty reliable delivery service, reserving delays for weather or technical issues, or because the thing set to be launched isn't even built yet. But in this case, a "rodent investigation" happening on the space station really needed a mouse chow refill, NASA said, and the 5,600-pound resupply mission simply couldn't ship without it. Luckily, the station's mice can expect their takeout in a cool two days.

SpaceX founder Elon Musk has not yet found a way to prevent mouse food mold, but he probably will. Watch the 1:16 p.m. launch from Florida's Cape Canaveral here. Kathryn Krawczyk

You say border wall, President Trump says "artistically designed steel slats."

On Twitter Tuesday night, Trump declared that he's figured out the real problem Democrats have with funding a wall along the southern border. "The Democrats, are saying loud and clear that they do not want to build a Concrete Wall — but we are not building a Concrete Wall, we are building artistically designed steel slats, so that you can easily see through it....it will be beautiful and, at the same time, give our Country the security that our citizens deserve. It will go up fast and save us BILLIONS of dollars a month once completed!"

"Build the artistically designed steel slats!" sure doesn't have the same ring to it as "Build the wall!" Catherine Garcia

In a bipartisan vote, the Senate on Tuesday passed the First Step Act, the biggest overhaul of the federal criminal justice system in decades.

The bill passed with a vote of 87-12, and was backed by conservative and liberal groups. Lawmakers spent more than a year negotiating the bill, which creates more rehabilitation programs, eases mandatory minimum sentencing, reduces the three-strike penalty from life in prison to 25 years, and lets some federal inmates earn time credits by taking part in special programs.

Now, the bill moves to the House, where it also has bipartisan support. After the Senate passed the measure, President Trump tweeted that he looks "forward to signing this into law!" Catherine Garcia

Over the course of a decade, the late George H.W. Bush sponsored a boy living in the Philippines, who had no idea that the money, letters, and gifts coming to him from the United States were being sent by a former president.

Bush learned about Compassion International, a nonprofit that connects sponsors with children from poor communities, in 2001, the organization's former president, Wess Stafford, told CNN on Tuesday. His security team did some digging, and after vetting Compassion International, agreed that Bush could sponsor 7-year-old Timothy. There were some rules, though; he had to use a pseudonym, to protect Timothy from someone who might target him due to his link to Bush.

For 10 years, Bush sent letters — signed "George Walker" — and funds that paid for Timothy's education, activities, and food. Stafford screened Bush's letters, describing them to CNN as being "the most sweet, spirited letters I have read from any sponsor, but he kept giving hints as to who he could be. He was really pushing the envelope." Bush sent photos of his dog, Sadie, and told Timothy that he was invited to the White House for Christmas. Timothy drew pictures for Bush, who in turn sent him sketch pads, colored pencils, and paint, even though gifts were not allowed.

Timothy didn't find out who his sponsor was until he turned 17 and graduated. He was stunned, Stafford said, never having a clue that his pen pal and benefactor was once the president of the United States of America. Catherine Garcia

A panel of eight federal judges on Tuesday dismissed 83 complaints filed against Supreme Court Justice Brett Kavanaugh by "lawyers, doctors, professors, and concerned citizens, among others."

The complaints lodged against him stem from his heated Senate confirmation hearings, accusing Kavanaugh of misconduct and making disrespectful statements to senators, Reuters reports. The panel threw out the complaints because the federal law governing judicial conduct does not apply to Supreme Court justices, only lower court judges.

Kavanaugh was a federal appeals court judge when President Trump announced in July he was nominating him for the Supreme Court. Before he was confirmed in October, Kavanaugh was accused by several women of sexual misconduct, allegations that he denied. Catherine Garcia

The U.S. State Department granted a visa on Tuesday to a Yemeni mother fighting to see her dying two-year-old son at a hospital in San Francisco.

Shaima Swileh's son, Abdullah, has a genetic brain disorder. Her husband, Ali Hassan, is a U.S. citizen, and he brought Abdullah to California in the fall for treatment. As a Yemeni citizen, Swileh was not able to get a visa under the Trump administration's travel ban, and was not allowed to travel to the U.S. with her family. They filed for a waiver, but Abdullah's health began to worsen, and he was put on life support last week.

Hassan wanted his wife to be able to kiss their son one final time, but also didn't want the toddler to suffer, and had given up hope that the waiver would come through. A social worker at the hospital contacted the Council on American-Islamic Relations in Sacramento, and their lawyers sued this week. "This will allow us to mourn with dignity," Hassan said in a statement. Swileh will fly to San Francisco on Wednesday.

Waivers are granted on a case by case basis, with applicants having to prove they are not security threats and that their entry is in the national interest. "We hope this case makes the administration realize the waiver process is not working," Basim Elkarra of CAIR told The Associated Press. "Thousands of families have been split apart, including families who have loved ones who are ill and are not able to see them in their final hours. I'm sure there are more cases like this." Catherine Garcia

No one could find evidence of the middle-class tax cut plan President Trump kept promising before November's midterms. Now, Treasury Secretary Steven Mnuchin won't even confirm it ever existed.

In a Tuesday interview, Mnuchin told Bloomberg the administration's top priority for next year is fixing 2017's tax overhaul. And as for the mysterious tax cut, well, Mnuchin said he was "not going to comment on whether it is a real thing or not a real thing."

The Tax Cuts and Jobs Act was passed last December and lauded in a documentary series from House Speaker Paul Ryan (R-Wisc.) released Tuesday. But its final form largely neglected promised tax cuts for the middle class, instead largely benefiting high-income Americans while raising the federal deficit by an projected $1.4 trillion in 10 years. Mnuchin didn't mention those issues when talking to Bloomberg, but said the administration will issue "some minor technical corrections" in early 2019.

Flash forward to October, just weeks before the midterms, and Trump again starts mentioning "a major tax cut for middle-income people." Mnuchin also affirmed he and House Republicans were working on a new tax plan to be released "shortly," Bloomberg says. Republicans, meanwhile, didn't know what Trump and Mnuchin were talking about.

When Bloomberg asked about that October hint on Tuesday, Mnuchin simply said "we have other things we're focused on." Which seems to be a fancy way of saying it's very, very far on the back burner. Kathryn Krawczyk