"We need to see Trump's tax returns as a matter of transparency", Shockley said.
But so far, the White House is betting that not enough people care about the issue to hurt Trump politically.
A new ABC/Washington Post poll found that as many as 75 percent of Americans want Trump to release his taxes for public inspection.
While claiming that thousands of people who on Saturday demanded Trump finally release his full tax returns were "paid" protesters, Trump tweeted, "The election is over!"
The president also suggested that the protests were organized by "paid" protesters, citing no evidence.
In his daily press briefing Monday, Spicer was asked specifically if Trump will ever make his tax returns public.
Two of the biggest Tax rallies took place in NY and Los Angeles, where witnesses said about 5,000 people were present in each cities, demanding the president to release his taxes. She demanded Trump release his tax returns as a way to prove his loyalties lie with the American people, and that his loyalties are indeed with the constituents he serves.
Trump, however, has said he has no plans to release his tax forms, making him the first president in 40 years to keep his taxes private.
Trump Considering Sanctions Against Russia, Iran for Supporting Syria
The news agency reported that during the Friday phone call, the Saudi monarch congratulated Trump for his "courageous decision". With no direct threat to US national security and with no congressional authorization, Trump's use of force was illegal.
JOHN SUNUNU: I think there is a little bit of energy on the left, if for no other reason because Trump provides a great focal point for them.
President Donald Trump's motorcade took a circuitous route back to Mar-A-Lago after he spent Saturday morning at his golf course, avoiding Tax Day protesters headed toward his Palm Beach estate.
Toting handmade signs, marchers shouted their discontent regarding the current administration's transparency and potential conflicts of interest due to Trump's global business ties.
The Washington, D.C., march began with a rally at the U.S. Capitol, where Sen. "Ron Wyden called on Trump to 'knock off the secrecy". However, many tax experts say Trump is not barred from releasing the information during the audit.
The Tax March rallies were organised through social media by a professor at Vermont Law School, Jennifer Taub, and comedian Frank Lesser.
Sue to the significance of April 15, what has bee tax day for many years, this protest was one of roughly 150 that were taking place nationwide.
It shouldn't be a surprise that the president's tax returns are being brought up, as we are about to start a debate over taxes.