(Adds details from tweet, market reaction)
BUENOS AIRES, June 11 (Reuters) - Moderate Peronist Senator Miguel Pichetto will run as vice president under Argentine President Mauricio Macri in October elections, the president wrote on Twitter on Tuesday, a selection that could help broaden the leader's voting base.
In a series of tweets, Macri called the October election an opportunity to "consolidate democracy" and laid out a series of goals such as defending human rights and combating crime.
"For all of this, we'll need to build agreements with a lot of generosity and patriotism, which all Argentines that share these values can support," Marci wrote.
"Because of all of this, I want to announce that Miguel Angel Pichetto will accompany me as vice-presidential candidate."
(Reporting by Gram Slattery and Walter Bianchi; Editing by Lisa Shumaker)
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