Why would a possible candidate for president form an exploratory committee?
to see how much support he or she can expect
o to announce his or her candidacy
o
to investigate possible running mates
o to discover independent voters in his or her home state

to see how much support he or she can expect

Explanation:

In United States election policy, exploratory committee’s role is established in order to determine if a potential candidate should stand for election. They are most often mentioned in relation to US presidential candidates prior to the announcement of the campaign and primaries.

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