[Democrats hate too much]

We need to get rid of GOP Establishment Senators.

[Alberta's Child]

What exactly does this country gain by having Collins representing Georgia in the U.S. Senate instead of Loeffler?

One big reason the "GOP Establishment" is behind Loeffler is that she's very wealthy and can finance her own campaign. This is a huge deal for this particular Senate seat because the GOP has to prepare for two elections in the next three years. This 2020 election is just to serve the remainder of Isakson's term. That term ends in 2022, so whoever wins in November will have to run again two years later.