Sen. J.D. Vance (R-OH) spent much of this week trying to preempt Vice President Kamala Harris’s public events, turning up to speak in Philadelphia on Tuesday and Michigan on Wednesday before big Democratic Party rallies in the same locations. But some are arguing the strategy is proving problematic. In Philadelphia, Vance spoke to a group of people in front of a blue sign that was intended to be an attack on Harris, but had part of its messaging obscured by attendees. All that could be seen was the huge name KAMALA above Vance’s head. Want more breaking political news? Click for the latest hea…