20180129 key races house representatives power balance 2018
Key House races to watch in 2018
01:54 - Source: CNN
Washington CNN  — 

Democrats picked off another Republican-held state legislative seat in a special election Tuesday – this time a suburban, Sarasota-area district in Florida.

Margaret Good’s win over James Buchanan – the Republican whose father is US Rep. Vern Buchanan – is another worrying sign for national Republicans headed into next fall’s midterm elections.

Good won by 7 percentage points in a district that President Donald Trump carried by 5 points in the 2016 election.

That swing in Democrats’ direction made the Florida contest the 36th GOP-held state legislative seat to change parties since Trump took office. And in a district where Republicans held a voter registration advantage of nearly 13,000, the Democratic Party sees it as evidence it can win in Republican strongholds.

It’s far short of the nearly 1,000 seats Republicans won during former President Barack Obama’s tenure, but Democrats see the wins as signs of an energized base that could deliver control of the House, and potentially the Senate, to the party in this year’s midterm elections.

It was the third straight loss for Florida Republicans in contests seen as bellwethers for the midterms. Democrats won a Miami-area state Senate special election last September with Annette Taddeo, then won the St. Petersburg mayoral race in November.

Unlike some other Trump-country victories for Democrats in recent weeks – including wins in Wisconsin and Missouri – the Florida contest was an intense battle.

It’s a growing, suburban district, much like the areas where other states have seen the biggest swings in Democrats’ favor.

Good was backed by the Democratic Legislative Campaign Committee and endorsed by former Vice President Joe Biden.

Her win comes as Republican Gov. Rick Scott considers whether to challenge Democratic Sen. Bill Nelson ahead of a March filing deadline.

“Just like we did last year with Annette Taddeo, Democrats are organizing, investing and winning elections across Florida as voters reject Rick Scott and Donald Trump’s disastrous agenda,” said Democratic National Committee Chairman Tom Perez.