This is a rare escalation

The subpoenaing of former president Bill Clinton is an escalation, both legally and politically.
Historically, it is rare for congressional oversight to demand deposition from former presidents of the United States.
Ghislaine Maxwell, Jeffrey Epstein's former girlfriend and accomplice, had already been summonsed.
But the House Oversight Committee has now added Bill and Hillary Clinton, several former Attorneys General and former FBI directors to its list.
It signals bipartisan momentum Democrats voting with Republicans for transparency.
The committee will now hear from several people with known ties to Epstein, his connection with Bill Clinton having been well-documented.
But the subpoenas set up a potential clash between Congress and the Department of Justice.
Donald Trump, the candidate, had vowed to release them. A government led by Mr Trump, the president, chose not to.
If Attorney General Pam Bondi still refuses to release the files, it will fuel claims of a constitutional crisis in the United States.
But another day of Epstein headlines demonstrates the enduring public interest in this case.