The Democrats took the house. Now, they want to attack America's business

Representative Maxine Waters, D-Calif., Who is expected to become chair of the House Financial Services committee, seeks information from Deustche Bank, a lender to the Trump Organization. The representative of the chairman of the intelligence committee of the House of Representatives, Adam Schiff, D-Calif., Told Axios that he wanted to review the role of Trump in blocking the merger between Time & Warner and AT & T.

In the Senate, a quartet of Democrats – including presidential candidates, Cory Booker of New Jersey and Elizabeth Warren of Mbadachusetts – highlight the meetings of US Secretary of Commerce Wilbur Ross with Chevron, Boeing and Greenbrier the year last while he would have held stakes in these companies.

"These meetings raise questions about Secretary Ross's compliance with federal criminal laws governing conflict of interest," they wrote in a letter to the agency's ethics office.

Democrats also want to test voters' aggressive stance on big business in the 2020 presidential election. Post-polling polls showed health care was the main issue at the half-way point. and the Democrats intend to make drug company investigations a top priority.

"Health care and the cost of prescription drugs are the reason I've finally decided to run," New Democratic Representative Elissa Slotkin of Michigan told CNBC. "As a country, we do not know how we are going to provide health care to our people, and we need to make them affordable."

Rob Kelner, attorney at Covington & Burling, said the Democrats had sent a hundred letters over the last two years to companies in four major sectors: pharmaceuticals, technology, energy and financial services . Now they are more likely to get answers.

"Prepare, prepare, prepare," Kelner told his customers. "Do not wait until you hit your head with a 2-by-4 before having your ducks in a row."

Kelner said technology and social media companies should be subject to increased scrutiny as bipartisan consensus builds to limit their reach and increase transparency. Democrats could also target energy companies as a counterbalance to the program of deregulation of the administration and the rejection of climate change. And Waters has been open about its main business targets if it supports the Financial Services Committee: Equifax, for its mbadive data breach, and Wells Fargo, for its fraudulent accounts.

"Americans are worried about the state of our country, especially their economic security, and have given Democrats the mandate to support this call for change," she wrote in a letter to the United States. to his colleagues last week and obtained by CNBC.

Some liberal groups are pushing Democrats to go even further. Demand Progress calls on candidates with extensive consumer protection experience to fill vacancies in regulatory agencies, such as the Securities and Exchange Commission and the Federal Communications Commission. These agencies are run by bipartite committees and Democrats are allowed to choose their candidates.

Jeff Hauser, director of the "Revolving Door" project, also encourages Democrats to lay the groundwork for a vast network of American businesses. He urged the party to issue subpoenas to companies ranging from hedge fund Renaissance Technologies, which has close ties with the Trump administration and is battling a legal battle with the IRS, to attack Sears retailer, whose the general manager was the housemate of the University of the Treasury Secretary, Steven Mnuchin.

"Democrats must develop a consistent political brand," said Hauser. "At this populist moment, the best opportunity for Democrats to make themselves known is to be the political party that fights the worst excesses of big American business on behalf of ordinary US citizens."

– Karen James and Janhvi Bhojwani of CNBC contributed to this report.