Donation refers to a gift to a charitable organization whereas a contribution is generally associated with a gift to a common fund or collection. Hillary's campaign is not a charitable organization so the use of donation would not be correct.
Verse and versus are different words. Verse is a noun related to writings, a verse from the poem. Verse can also be a verb, but not in your context. Versus is a preposition used to indicate opposition, apples versus oranges. You should spell it out unless using it to report sports scores, and in this context, use the abbreviation vs. with the period.
For more detailed information, I used the following references; the Longman Handbook and dictionary.com.
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