Question: What Roman politician and general stated the location of Veragri was in the canton of Valais between the Nantuates and the Seduni?

Context paragraphs:
Gnaeus Cornelius Lentulus Clodianus: Gnaeus Cornelius Lentulus Clodianus born 114 BC, was a Roman politician and general who was one of two Consuls of the Republic in 72 BC along with Lucius Gellius Publicola.  Closely linked to the family of Pompey, he is noted for being one of the consular generals who led Roman legions against the slave armies of Spartacus in the Third Servile War.

Roman Catholic Diocese of Sion: The Diocese of Sion (Latin: "Dioecesis Sedunensis" , French: "Évêché de Sion" , German: "Bistum Sitten" ) is a Roman Catholic ecclesiastical territory in the canton of Valais, Switzerland.  It is the oldest bishopric in the country and one of the oldest north of the Alps.  The history of the Bishops of Sion, of the Abbey of St. Maurice of Valais as a whole are inextricably intertwined.

Lucius Gellius Publicola (consul 72 BC): Lucius Gellius Publicola (c. 132 BC – c. 54 BC) was a Roman politician and general who was one of two Consuls of the Republic in 72 BC along with Gnaeus Cornelius Lentulus Clodianus.  A supporter of Pompey, he is noted for being one of the consular generals who led Roman legions against the slave armies of Spartacus in the Third Servile War.

Mark Antony: Marcus Antonius (Latin: ; January 14, 83 BC – August 1, 30 BC), commonly known in English as Mark or Marc Antony, was a Roman politician and general who played a critical role in the transformation of the Roman Republic from an oligarchy into the autocratic Roman Empire.

Seduni: The Seduni or Sedunii were a Gallic tribe in the valley of the Upper Rhone at Roman contact, whom Julius Caesar ("B. G." iii.  1, 7) mentions: "Nantuates Sedunos Veragrosque".  These tribes were conquered by Rome are also mentioned in the Trophy of the Alps (Plin.  iii.  20) in the same order.  They were east of the Veragri, in the modern Swiss canton of Valais.  Their chief town was "Sedunum" (modern Sion, Switzerland).  The Seduni also participated in the Battle of Octodurus at the site of modern-day Martigny, Switzerland.

Julius Caesar: Gaius Julius Caesar (Latin: CAIVS IVLIVS CAESAR, ] , born: 13 July 100 BC – 15 March 44 BC), usually called Julius Caesar, was a Roman politician and general who played a critical role in the events that led to the demise of the Roman Republic and the rise of the Roman Empire.  He is also known as a notable author of Latin prose.

Veragri: The Veragri (Greek: Οὐάραγροι ) were a Gallic tribe located in present-day Switzerland.  The Veragri are placed by Julius Caesar ("B. G." iii.  1, 6) in the canton of Valais between the Nantuates and the Seduni.  Their chief town was Octodurus (modern Martigny), whence the Veragri are called "Octodurenses" by Pliny.  Dio Cassius (xxxix.  5), claiming Caesar as his source, says that the Veragri extended from the territory of the Allobroges and Lake Geneva to the Alps; which is likely not true.  Strabo (iv.)  mentions the "Varagri", as he calls them, between the Caturiges and the Nantuatae; and Pliny (iii.  20) between the Seduni and the Salassi: the Salassi were on the Italian side of the Alps in the Val d'Aosta.  Livy (xxi.  38) places the Veragri among the Alps and on the road to the pass of the Pennine Alps, or the Great St. Bernard Pass, which is correct.  He says that the pass was occupied by "half German tribes", leaving the ethnic affiliation of the Veragri in some doubt.

Gaius Considius Longus: Gaius Considius Longus was a Roman politician and general in the last years of the Roman republic.  As a commander in Africa, he fought on the Pompeian side in the Roman civil war and was killed by his own retinue in 46 BC as he attempted to escape after Julius Caesar's victory at Thapsus.

Lucius Julius Caesar (consul 64 BC): Lucius Julius Caesar (fl.  1st century BC) was a Roman politician and senator who was elected consul of the Roman Republic in 64 BC.  A supporter of his cousin, the Roman dictator Gaius Julius Caesar, Lucius was a key member of the senatorial faction which strove to avoid civil war between the Roman Senate and Marcus Antonius (Mark Antony) in the aftermath of the Dictator's assassination.

Lucius Cornelius Balbus (proconsul): Lucius Cornelius Balbus (fl.  1st century BC), called "Minor" – the Younger – to distinguish from his uncle, was a Roman politician and general of Hispanian origin.  Although from a family of naturalized foreigners (he received Roman citizenship at the same time as his uncle, around 72 BC) he did valuable services for the early Roman Empire and also contributed to public architecture of its capital.

Supporting paragraphs: Veragri Julius Caesar
Answer: Julius Caesar