Anyone advocating for IE in the early 2000s was because the web sucked back then and IE could run ActiveX. Granted, thinking back, giving a web app direct hardware access did lead to a lot of security issues. However, and theoretically, if the software is clean (like internal government software should be), it was pretty powerful.

Additionally, I challenge your Clinton remark, and ask you provide a source.

As of my last update in April 2023, there was no record or credible report of Hillary Clinton, the former U.S. Secretary of State and 2016 Democratic presidential candidate, advocating for Internet Explorer to be the only web browser used in government settings. Hillary Clinton's tenure in government, both as a Senator and as Secretary of State, did involve discussions and decisions about technology use in government. However, these discussions were typically centered around issues of security, information management, and diplomatic communication rather than endorsing specific software products like web browsers. In the public domain, there was no evidence to suggest that she made any statements or policy decisions specifically favoring Internet Explorer over other web browsers for government use.