WASHINGTON – President Donald Trump's most powerful GOP ally in the Senate said Friday that Congress is unlikely to deliver another big COVID-19 relief bill before the election, casting doubt on the on-again, off-again negotiations that have failed to deliver results so far despite weeks of talks.Majority Leader Mitch McConnell told an audience in Kentucky that he doesn't see a deal coming together soon out of a “murky" situation in which the participants in the negotiations are elbowing for political advantage. “I'd like to see us rise above that like we did in March and April but I think it's unlikely in the next three weeks," McConnell said.He spoke after Trump apparently performed an about-face, empowering Treasury Secretary Steven.