What does 'prompted' here means?
Mr Netanyahu prompted this breakdown during his election campaign. He declared that a Palestinian state would never be created on his watch, repudiating his acceptance in 2009 of peace based on two states. On election day he urged his supporters to rush to vote because Arab citizens of Israel were turning out “in droves”. His flirtation with Arab-hatred was disturbing for Mr Obama, for liberal-minded supporters of Israel (see Lexington) and, indeed, for this newspaper.

Does it simply means that he said something during the election campaign?

http://www.economist.com/news/leaders/21647292-although-barack-obama-right-chastise-binyamin-netanyahu-israels-prime-minister-has-pointPlease also explain the meaning of 'of peace based on two states'.

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Question

What does 'prompted' here means?
Mr Netanyahu prompted this breakdown during his election campaign. He declared that a Palestinian state would never be created on his watch, repudiating his acceptance in 2009 of peace based on two states. On election day he urged his supporters to rush to vote because Arab citizens of Israel were turning out “in droves”. His flirtation with Arab-hatred was disturbing for Mr Obama, for liberal-minded supporters of Israel (see Lexington) and, indeed, for this newspaper.

Does it simply means that he said something during the election campaign?

http://www.economist.com/news/leaders/21647292-although-barack-obama-right-chastise-binyamin-netanyahu-israels-prime-minister-has-pointPlease also explain the meaning of 'of peace based on two states'.

Thanks

Answer

Does it simply means that he said something during the election campaign? - yes, the second sentence spells that out - He declared that a Palestinian state would never be created on his watch, repudiating his acceptance in 2009 of peace based on two states.
The two state solution refers to the proposition that the only way there will ever be peace between Israel and the Palestinians is for two states to be established side by side, one for the Israelis and one for the Palestinians. Mr Netanyahu previously expressed support for this plan, but then repudiated it during the election campaign.

Answer

Yeah, he might have done or said something during the campaign which led to / caused the breakdown to happen.

'of peace based on two states'.
treaty or agreement of peace between 2 states or nations.