by Mike Krumboltz On July 31, Chelsea Clinton will marry longtime sweetheart Marc Mezvinksy . As the nuptials draw nearer and the wedding bells grow louder, the interest in Bill and Hillary's future son-in-law grows larger. Over the past week, online lookups for "marc mezvinksy" soared nearly 80%. Those who don't know his name (but are aware of the impending event) pushed Web searches for "chelsea clinton fiancé" up 132%. And the Mezvinsky-mania doesn't stop there.