Question: Which English-American journalist and former British MP launched Heat Street?

Context paragraphs:
Chris Smith, Baron Smith of Finsbury: Christopher Robert Smith, Baron Smith of Finsbury, PC (born 24 July 1951) is a British politician and a peer; a former Member of Parliament (MP) and Cabinet Minister; and former chairman of the Environment Agency.  For the majority of his career he was a Labour Party member.  He was the first openly gay British MP, coming out in 1984, and in 2005, the first MP to acknowledge that he is HIV positive.

George Dangerfield: George Bubb Dangerfield (October 28, 1904 in Newbury, Berkshire – December 27, 1986 in Santa Barbara, California) was an English-American journalist, historian, and the literary editor of "Vanity Fair" from 1933 to 1935.  He is known primarily for his book "The Strange Death of Liberal England" (1935), a study of the rapid decline of the Liberal Party in the United Kingdom in the years before World War I, and "The Era of Good Feelings", which won the 1953 Pulitzer Prize for History.

Euan Edworthy: Euan Edworthy was educated at Ampleforth College, UK, and graduated from the University of Wales, Cardiff, in 1991 with a degree in Politics and History.  In 2004, he initiated continental Europe’s first ever Speakers' Corner in Prague and in 2007 established Speakers’ Corner Trust, an international charity, with former British MP Peter Bradley which promotes freedom of speech.  Euan is also a Trustee of the Anglo Czech Education Fund and conceived the idea for the Winged Lion Memorial to commemorate Czechoslovaks who fought with the Royal Air Force during the Second World War.  The monument was unveiled in Prague on 17 June 2014 to much local and global acclaim.  He has also established the Czech Children of Courage Award and Prague’s Red Nose Day Campaign.

Roshonara Choudhry: Roshonara Choudhry (Bengali: রুশনারা চৌধুরী ; born 1989) is a former British student and an Islamic extremist who stabbed British MP Stephen Timms on 14 May 2010 during his constituency surgery in an attempt to kill him.  She was found guilty of attempted murder and jailed for life with a minimum term of 15 years.  Choudhry is the first al-Qaeda sympathiser to attempt an assassination in Britain.

Piara Khabra: Piara Singh Khabra (20 November 1921 – 19 June 2007) was a British politician who served as the Labour Member of Parliament (MP) for Ealing Southall from 1992 until his death.  He was the fifth Asian, and the first Sikh, to become a British MP.  From the retirement of Sir Edward Heath in 2001 until his death, Khabra was the oldest MP sitting in the House of Commons, and at the end of his career was the only sitting MP to have served in the British Commonwealth's forces during the Second World War.

Louise Mensch: Louise Daphne Mensch ("née" Bagshawe; born 28 June 1971) is an English-American journalist and former British MP.  After a period working public relations for the music industry in the early 1990s, she became known, as Louise Bagshawe, as a writer of "chick-lit" novels.  She was elected Conservative MP for Corby in the 2010 UK general election, but resigned from Parliament in August 2012 to move to New York City to live with her second husband, American music manager Peter Mensch.  In 2014, she began working for News Corporation, and co-launched its "Heat Street" website in February 2016.  Since leaving "Heat Street" in mid-December 2016, she has published primarily on her blog "Patribotics", which she launched in January 2017, and her Twitter account.  She left News Corp entirely in March 2017.  Mensch, as well as her website "Heat Street", has published multiple unverified claims, and promoted hoaxes and conspiracy theories about the Trump administration and its ties to the Russian Federation.

Mancherjee Bhownagree: Sir Mancherjee Merwanjee Bhownagree, KCIE (15 August 1851 – 14 November 1933) was a British Conservative Party politician of Indian Parsi heritage.  He was a Member of Parliament (MP) representing the constituency of Bethnal Green North East in the Parliament of the United Kingdom between 1895 and 1906, the second Indian to be a British MP after fellow Parsi Dadabhai Naoroji, and the longest-serving British Asian MP until Keith Vaz (first elected in 1987).

Dadabhai Naoroji: Dadabhai Naoroji (4 September 1825 – 30 June 1917), known as the Grand Old Man of India, was a Parsi intellectual, educator, cotton trader, and an early Indian political and social leader.  He was a Liberal Party member of Parliament (MP) in the United Kingdom House of Commons between 1892 and 1895, and the first Asian to be a British MP, notwithstanding the Anglo-Indian MP David Ochterlony Dyce Sombre, who was disfranchised for corruption.

Anthony Cave Brown: Anthony Cave Brown (March 21, 1929 in Bath - July 14, 2006 in Warrenton, Virginia) was an English-American journalist, espionage non-fiction writer, and historian.

Heat Street: Heat Street was a news, opinion and commentary website based in the United States and United Kingdom.  The website was launched in April 2016 by U.S.-based British writer and former politician Louise Mensch.  It was owned by News Corp under Dow Jones & Company and featured sections on politics, technology, culture, business, entertainment, and life.  News Corporation announced that the site would shut down on August 4, 2017, to become part of MarketWatch.

Supporting paragraphs: Heat Street Louise Mensch
Answer: Louise Mensch