President Donald Trump has so far focused his second term on fulfilling his campaign promise to round up, detain and deport millions of undocumented immigrants. But one section of H.R.1 — his "Big, Beautiful Bill Act" — undercuts that promise,, and some Republicans aren't happy. Politico reported Tuesday that one portion in H.R. 1 that pertains to tax-advantaged savings accounts dubbed "Trump Accounts" could theoretically benefit the American-born children of undocumented immigrants. The "Trump Accounts" allow for the government to fund investment accounts for new babies born in the U.S. up to $1,000. That $1,000 would be tied to an index fund and managed by the child's parents until they reach adulthood, and would be allowed to grow tax-free.. Parents or other private entities can also contribute up to $5,000 a year to a child's "Trump Account." READ MORE: 'Don't know anyone who's happy': 'Well over 20' Republicans now want to sink Trump's bill However, while the Senate's version of H.R. 1 would require babies benefiting from "Trump Accounts" to have a valid Social Security number, their parents are not. This means that American-born children of undocumented immigrants could have their own "Trump Accounts" for 18 years. Former Republican staffer George Callas complained on social media that the policy could encourage more undocumented immigrants to have children in the U.S. "Come to the US illegally and when your child is born here, they’ll get federally subsidized baby bonds," Callas wrote. That section of the bill may very well prove controversial in the House of Representatives, where reportedly at least 20 Republicans are pledging to vote against the Senate's version of the bill. House Speaker Mike Johnson (R-La.) has pledged to try to pass the Senate's version as-is in order to avoid further delay and get the bill to Trump's desk. However, that could be a heavy lift given public announcements by multiple Republicans to restore parts of the House's version that the Senate removed. "Our bill has been completely changed," Rep. Ralph Norman (R-S.C.) said. "It's a non-starter." READ MORE: 'We should take it seriously': Critics blast Trump's latest idea as 'straight up fascist' Click here to read Politico's full article.