Nomination to face steep congressional opposition
Congress returned from summer recess on Tuesday
Florida Republican announced re-election bid after nightclub massacre
Christine Leinonen spoke at gun control rally in D.C.
Republican acknowledges Pulse nightclub victims, reaffirms marriage opposition
Donald Trump spoke at nearby anti-LGBT conference on Thursday
Gathering to take place a few miles from Pulse nightclub
Anti-LGBT confab takes place on two-month anniversary of massacre
Florida senator cited tragedy as reason to seek re-election
Orange County Mayor Teresa Jacobs spearheaded resolution
