According to senator lodge, which two previous american foreign policies would the us be violating if it ratified the treaty of versailles and joined the league of nations?

Farewell Address by Washington--this address urged the nation to avoid alliances and getting involved in affairs not our own. This set the tone for isolationism.

Monroe Doctrine--this foreign policy stated the US would protect the Western Hemisphere from European involvement and implied the US would stay out of European affairs. 

The Treaty of Versailles and League of Nations would involve the US in world affairs and bring European issues to the doorstep of the US.