Blair, left, with Deborah Jane Palfrey, the late D.C. Madam.

Montgomery Blair Sibley has represented the D.C. Madam and attempted to open a medical marijuana cultivation center in the District. Now the quixotic former lawyer is setting his sights on the White House.

In an email sent out this morning, Sibley announced that he was launching a write-in campaign for the presidency, insisting that only he could save the nation from a “concentration of legislative power in the hands of the few and the judicial replacement of the Rule of Law with the Rule of Whim and Caprice.” He also announced that he had filed a lawsuit challenging President Obama’s eligibility for the White House because, well, “he is not a ‘natural born Citizen.'”

Sibley is either humorous or notorious, maybe a mix of both. A self-proclaimed “scion of [a] prominent 19th century political family,” Sibley’s legal antics and messy divorce have become something of a legal legend — on his bio, he admits that he spent 77 days in a Florida jail for not making child custody payments, and was eventually suspended from practicing law in three states and before 13 federal courts. Oh yeah, and he sued the Supreme Court for treason. Twice.

In what was probably he is biggest claim to fame, he represented Deborah Jane Palfrey, the D.C. Madam who’s list of clients included Republican Louisiana Senator David Vitter and senior officials of the Bush administration. She was found guilty in 2008 of racketeering charges, and killed herself two weeks later.

More recently, he’s become an outspoken advocate and hopeful entrepreneur in the District’s nascent medical marijuana program. Early on he scoped out a site along New York Avenue NE that he hopes to turn into a cultivation center, and he has filed a number of lawsuits to stop the city from requiring applicants to sign legal waivers and preempt the federal government from cracking down on local cultivators and dispensers. (He hasn’t yet been successful.)

Beyond hoping to disqualify Obama based on a novel interpretation of the Constitution’s language, Sibley wants to expand the size of Congress to make it more representative (way more representative — under his plan, Congress would increase to some 10,000 members) and improve the state of the nation’s judiciary.

You may not end up writing the guy in, but he’d at least be the type of president you’d want to have a beer with.