Said White House counsellor Kellyanne Conway, "I don't know that there will be much of an appetite for Democrat lawmakers to spend all of their time, or most of their time or even a fraction of their time investigating, instigating, trying to impeach and subpoena people".
Meanwhile, US President Donald Trump considers the midterm election results to be a success amid projections that Democrats will take control of the US House of Representatives and the Republicans will maintain a majority in the US Senate.
In the final stretch, Trump hardened his rhetoric on issues that appealed to his conservative core supporters, issuing warnings about a caravan of Latin American migrants headed to the border with Mexico and condemnations of what he called USA liberal "mobs".
Almost 40 percent of voters cast their ballots to express opposition to the president, according to AP VoteCast, a national survey of the electorate, while about 25 percent said they voted to express support for Trump.
"There will be, I imagine, great introspection within the Trump White House", said Gearan, who is now the director of the Harvard Kennedy School Institute of Politics.
All 435 seats in the House of Representatives, 35 seats in the 100-member Senate and 36 governorships were up for grabs.
In the outgoing House, the Republicans had 235 seats while the Democrats 193.
Democrats won the majority of New York's state Senate seats on Tuesday, taking hold of the legislative body for the first time in years.
That was a risky strategy with a potentially huge reward: had Republicans held on to both chambers of Congress, Trump would have been able to tout another major upset victory.
Minority Leader of the House and potential next Speaker Nancy Pelosi gave a speech that exuded confidence of success for the Democrats after her party were projected to take control of the chamber. Senator Ted Cruz also retained control of his Texas seat after a nail-biter race in which Democratic rising star Beto O'Rourke whipped up a unexpected level of enthusiasm.
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The Republicans held on to the Senate and narrowly survived a number of big individual races, including in Florida.
Democrats believe that if they win back Congress on Nov 6, they can prevent Mr Trump from completing his agenda and winning a second term.
In the Senate, where Democrats were defending seats in 10 states that Trump won, Republicans ousted four Democratic incumbents.
Forty-three-year-old steelworker Randy Graham said he has mixed feelings: He supports President Donald Trump's move to impose tariffs on some foreign steel and aluminum, but not some of the president's other steps, which he considers anti-labor.
In the last two decades there have only three election cycles where one party picked up 24 or more seats.
The midterms are not even over yet, but House Democrats have signaled that they are going to demand President Trump release his tax returns.
In Indiana, Republican Mike Braun beat Democratic incumbent Senator Joe Donnelly.
The results mark a rebuke of President Trump, whose visage dominated the midterms, though Republicans' better-than-expected Senate showing negated some of that.
Twenty-five percent described health care and immigration as the most important issues in the election, according to AP VoteCast, a national survey of the electorate. The Republican side of the aisle elected mostly white men.
Democrats also successfully turned the GOP tax cuts into a net negative in many races, neutralizing an issue Republicans once hoped to run hard on by arguing the massive corporate cuts and tax breaks for wealthy Americans were helping rich people the most, and by fueling the federal deficit would lead Republicans to try to cut Social Security and Medicare in the near future.
Voters also punished moderate Senate Democrats running in Trump-heavy states who opposed the confirmation of Brett Kavanaugh to the Supreme Court.