Republican Senator Lindsey Graham's reelection race to 'toss-up' status, as he faces an energetic opponent and President Donald Trump takes on severe headwinds – a flashing warning sig for Republicans seeking to keep control of the Senate. The news, in a race ranking by a respected race-tracker, comes amid an onslaught of bad polling for President Donald Trump, who is battling COVID-19 at the White House this week. A new Quinnipiac University poll has Democrat Joe Biden leading Trump 51-40 in battleground Florida – a jump over a persistent but narrower Biden lead in a state Trump carried in 2016....