Others, like former MA governor Deval Patrick, California Senator Kamala Harris and former vice president Joe Biden, have been a little more active.
While some Democrats have anxious that putting Pelosi at the party's helm hurts them in GOP-leaning districts, the longtime leader insisted she wasn't bothered by what she described as her "vilification around the country" in Republican attack ads. The GOP's grip on high-profile governorships in Florida, Georgia and Wisconsin were at risk as well.
His Republican opponent is Ron DeSantis, a conservative backed by US President Donald Trump.
Trump's usually active Twitter feed was quiet Tuesday as voting booths opened across the country. Basically, what happened was the same slight error - the marginal underrepresentation of white working class voters favouring Trump - was replicated in a number of key districts located in states with large numbers of electoral college votes.
Turnout for mid-term elections is traditionally lower than in presidential years, but the results could have dramatic implications for the United States, and in particular for Trump's legislative agenda.
Early @CNN exit poll: 75% see extremist violence as important to their vote. Rasmussen notes, "Forty-three percent (43%) of voters say the country is headed in the right direction". I don't care what they say.
A turbulent election season that tested President Donald Trump's slash-and-burn political style against the strength of the Democratic resistance comes to a close as Americans cast ballots in the first national election of the Trump era.
"The president absolutely is the focal point".
Bill Clinton and Andrew Johnston are the only two presidents to ever be impeached, in 1998 and 1868 respectively. The Democrats would need to win two more Senate seats to gain control of the Senate. Studies have found voter fraud to be a rare occurrence in the U.S.
It includes 35 senator positions and 36 state governors as well as all 435 members of the House of Representatives.
GOP Whip Steve Scalise said the president's rallies were building momentum and with the economy a selling point, he predicted his party would retain a slim majority.
Instead of trumpeting the GOP's $1.5 trillion tax cuts, the debate was dominated by Trump's dire prediction of "invasion" from the migrant caravan and what he called the "radical" agenda of speaker-in-waiting Pelosi.
Public opinion polls and analysts suggest that opposition Democrats have an advantage in the battle for control of the House of Representatives.
The political and practical stakes were sky-high.
On Monday, Facebook, NBC and even the Mr Trump's favourite network, Fox News, announced they would stop broadcasting a 30-second ad paid for by his campaign, which featured an undocumented Mexican immigrant. The current session comprises 235 Republicans, 193 Democrats and seven vacant seats (five of which were last held by Republicans). But the marquee event in this hour is the West Virginia Senate race, where incumbent Democrat Joe Manchin, who voted in favor of confirming Brett Kavanaugh to the Supreme Court, is expected to hold on.
In the evening, family and friends were joining Trump and first lady in the White House residence to watch the election returns.
"A failure to take the House would be near apocalyptic for the country", Democratic Congressman Jim Hines told Esquire.
The outcome is clouded by the dramatically different landscape between the House and Senate. Some, like Donald Trump, might be happy about that, but the exit polls also place Trump's approval rating at just 44%, and disapproval at 55%. The Blue seek to regain control of Senate and House, while the Red are set to expand their narrow majority.
"Nearly half of voters felt their financial situation is the same as it was two years ago".
Sean Trende of RealClearPolitics also had some possible good news for the GOP, noting, "There really are believable scenarios that don't require Republicans to win districts that they have written off. Republicans have to catch some breaks, but they don't have to catch breaks in ways that shock and surprise us".
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