What legal challenges exist regarding DOGE Service's attempts to access sensitive IRS data?

Legal challenges are a significant factor in the standoff between the IRS and Elon Musk's DOGE Service. The potential for legal action is particularly potent regarding systems control at the IRS, where mass firings of 9,000-10,000 employees are expected. The legal situation is complicated by the fact that ultimately these federal employees serve at the pleasure of the President. Besides system access concerns, there are reports of physical confrontations to prevent DOGE personnel from accessing classified information in secure areas, similar to incidents at the Social Security Administration that led to its director's resignation.