Frank Lautenberg introduced a proposal to close the gun show loophole in federal law. One of the reasons was for using the tax loophole. A bill to close the gun show loophole in Virginia was submitted, but eventually failed. He called on lawmakers to close the gun show loophole. This exclusion has been called the "Halliburton Loophole". The tax loophole was expected to close on January 1, 2015. Thanks to a legislative loophole regulating off-year fundraising, FreshPAC accepted unlimited contributions. There is an arguable loophole in the theorem. Legislative efforts to close the 90-10 loophole have failed. For example, Gerard 't Hooft has argued that the aforementioned superdeterminism loophole cannot be dismissed. The gun show loophole and background checks became a focus of a national debate. It did not address the gun show loophole. Another Republican attempt to close the loophole was made in 2020. However, that loophole was quickly closed. Accordingly, it effectively comprised a "loophole" through which Eastern Bloc citizens could still move west.