12/04/2014 10:54 pm ET

Inside The Feud Between Rand Paul And John McCain On ISIS Vote

Brendan Hoffman via Getty Images

A high-profile clash of Republican senators erupted Thursday after Sen. Rand Paul made a surprise, last-minute effort to force a vote on a declaration of war against the Islamic State.

The battle pitted Paul, a likely presidential contender who is wary of foreign entanglements, against Sen. John McCain, a past Republican White House nominee who remains his party's highest-profile defense hawk. The dispute between the upstart and the Old Bull was as much about respect for Senate procedure and tradition as it was about the deep foreign policy differences that divide the two men.

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