Banks and investors have been trying to decipher how the billionaire will balance his populist message to the middle class with his Wall Street ties, which include a cadre of former Goldman Sachs Group Inc. bankers he's tapped for key roles in his administration.

Executive order

The president's comments came as he signed an executive order requiring that government agencies revoke two existing regulations for each new one they issue, fulfilling a campaign promise. Trump campaigned on cutting a federal bureaucracy that he blames for making it harder for businesses to grow and get funding.

Trump didn't provide data linking lending rates to Dodd-Frank.

Key lending portfolios have been on the rise since former President Barack Obama signed Dodd-Frank into law in July 2010. At the time, commercial and industrial lending was at $1.2 trillion, according to data from the Federal Reserve. Almost seven years later, that measure of credit from U.S. banks to the business sector is up almost 70 percent to $2.1 trillion.

Related: DOL clarifies fiduciary rule for insurance companies

Small business loans have declined as a percentage of overall commercial and industrial loans. Commercial and industrial loans of $1 million or less fell to 20 percent in the third quarter of last year, down from 31 percent in the second quarter of 2010 just before the Dodd-Frank Act was passed, according to the Federal Deposit Insurance Corp.

Justin Schardin, an analyst at the Bipartisan Policy Center in Washington who focuses on financial regulation, said it's unclear how much the 2010 law has directly affected lending to small businesses. "It's worth looking at all different types of lending to see what impact post-crisis reforms have had," he said.

Getting Congress to make big changes to the 2010 banking law won't be easy. While House Republicans, led by Jeb Hensarling, chairman of the House Financial Services Committee, is working on a measure that would rip apart most of Dodd-Frank, the Senate Banking Committee hasn't proposed its own version. Most legislation would require support from at least some Democrats in the Senate to avoid filibuster rules, unless lawmakers try to attach parts of it to a fast-track budget process.

Asked whether Trump would seek to change Dodd-Frank through legislation or executive action, the president's spokesman, Sean Spicer, offered no clarity. He told reporters Monday in Washington that Trump would "continue to work with Congress" on changing the law. 

Related: Trump presidency could bring momentum to much needed flood insurance reform