Supporters started arriving as early as 7 a.m. Rally is at 8 p.m.
GOP ticket puts focus on Midwest this week.
Her son was soldier killed in Afghanistan.
“People ... want trade policy that protects Michigan workers,” chairman Brandon Dillon said.
Apple soars 7 percent; Twitter plunged 15 percent.
It will be built in Jackson Park on Chicago's South Side.
Move aims to protest 'continued disrespect' toward officers.
To win, GOP nominee will have to flip states that voted for Obama in 2012.
Clinton campaign quickly accuses him of encouraging espionage.
Researchers are crediting money raised for discovery of gene.