Question: Who is the Irish Republican Army member who was a driver for the president of the Sinn Féin political party?

Context paragraphs:
Republican News: Republican News was a longstanding newspaper/magazine published by Sinn Féin.  Following the split in physical force Irish republicanism in the late 1960s between the "Officials" (Official Sinn Féin — also known as Sinn Féin Gardiner Place — and the Official IRA) and the "Provisionals" (Provisional Sinn Féin — also known as Sinn Féin Kevin Street and now most commonly simply as Sinn Féin — and the Provisional IRA) "Republican News" was eclipsed by "An Phoblacht", a new magazine launched by Provisional Sinn Féin in 1970.  "An Phoblacht" came first and then in early 1970, Joe Graham and Proinsias Mac Airt put together "The Republican News" and it functioned independently for quite a while.  Graham worked on only three issues of it before starting "The Vindicator".  The magazines merged under the name "An Phoblacht/Republican News" in 1979.

Joe Cahill: Joe Cahill (Irish: Seosamh Ó Cathail ; 19 May 1920 – 23 July 2004) was a prominent figure in the Irish Republican movement in Northern Ireland and former chief of staff of the Provisional Irish Republican Army (IRA).  He joined a junior-republican movement, Na Fianna Eireann, in 1937 and the following year, joined the Irish Republican Army.  In 1969, Cahill was a key figure in the founding of the Provisional Irish Republican Army.  During his time in the Provisional IRA, Cahill helped import weapons and raise financial support.  He served as the chief of staff in 1972, but was arrested the following year when a ship importing weapons was intercepted.  After his release, he continued to serve on the IRA Army Council and lead all financial dealings for Sinn Féin.  In the 1990s, the IRA and Sinn Féin began to work on seeking peace.  Cahill served on the council that called a cessation on 21 July 1996.  Cahill attended several of the talks that finally led to the Good Friday Agreement on 10 April 1998.  Shortly after the agreement was made, Cahill resigned as treasurer of Sinn Féin.  To honour his service, he was made honorary Sinn Féin Vice-President for life.

Ruairí Ó Brádaigh: Ruairí Ó Brádaigh (] , born Peter Roger Casement Brady; 2 October 1932 – 5 June 2013) was an Irish republican revolutionary and political leader.  He was Chief of Staff of the Irish Republican Army (IRA) from 1958 to 1959 and again from 1960 to 1962, president of Sinn Féin from 1970 to 1983, and president of Republican Sinn Féin from 1987 to 2009.

Republican Sinn Féin: Republican Sinn Féin or RSF (Irish: "Sinn Féin Poblachtach" ) is an Irish republican political party in Ireland.  RSF claims to be heirs of the Sinn Féin party founded in 1905 and took its present form in 1986 following a split in Sinn Féin.  RSF members take seats when elected to local Irish councils but do not recognise the validity of the partition of Ireland and subsequently the legitimacy of the Northern Ireland (Stormont) or Republic of Ireland (Leinster House) parliaments, so the party does not register itself with them.

Workers' Party of Ireland: The Workers' Party (Irish: "Páirtí na nOibrithe" ), originally known as Official Sinn Féin, is a Marxist–Leninist political party active throughout Ireland.  The party originated with a split between factions of Sinn Féin (which was founded in 1905) and the Irish Republican Army (IRA), which took place in 1969–70, early in the Troubles.  The faction that broke away became known as the Provisional Irish Republican Army and Provisional Sinn Féin.  The Officials' leaders at the time the Provisionals left were Cathal Goulding and Tomás Mac Giolla.

Martin Lynch: Martin Lynch is a native of Belfast, Northern Ireland and was reportedly a member of the Provisional Irish Republican Army (IRA) Army Council.  Not to be confused with the Belfast playwright of the same name, Lynch is alleged to have been the adjutant-general, who had day-to-day control of the IRA.  He is a former driver of Gerry Adams and Martin McGuinness, and is considered an Adams loyalist.

Malachy Carey: Malachy Carey was a volunteer in the Provisional Irish Republican Army and a Sinn Féin candidate in local government elections.  He was born in Loughgiel, County Antrim in 1956 to an old County Antrim family.  He was assassinated by a Loyalist death squad in Ballymoney, County Antrim.  on 12 December 1992.  His death was reported in Republican newspaper An Phoblacht.  A Sinn Féin Cumann (local branch of Sinn Féin) has been named in his honour.

Leader of Sinn Féin: The leader of Sinn Féin (alternatively known as the "Uachtarán Shinn Féin" or "President of Sinn Féin") is the most senior politician within the Sinn Féin political party in Ireland.  Since 13 November 1983, the office has been held by Gerry Adams, following the resignation of Ruairí Ó Brádaigh as leader of the party.

Gerry Adams: Gerard "Gerry" Adams (Irish: "Gearóid Mac Ádhaimh" ; born 6 October 1948) is an Irish republican politician who is the president of the Sinn Féin political party and a Teachta Dála (TD; a member of the Irish parliament) for Louth since the 2011 general election.

Sinn Féin Funds case: The Sinn Féin Funds case ("Buckley and Others v. the Attorney-General and Another") was a 1942–48 Irish court case in which the Sinn Féin party claimed ownership of funds deposited with the High Court in 1924 which had belonged to the Sinn Féin party before 1923.  The Sinn Féin Funds Act 1947, which attempted to halt the court case and assign the funds to Bord Cistí Sinn Féin, was ruled unconstitutional by the Supreme Court in an important judgement on separation of powers and private property rights.  The original action was subsequently decided against Sinn Féin, on the basis that the pre-1923 party was separate from the 1940s party.  Most of the disputed funds were consumed by legal costs.

Supporting paragraphs: Martin Lynch Gerry Adams
Answer: Martin Lynch