If investigators show that the White House was involved in the growing IRS-Tea Party scandal, which has robbed Democrats of the so-called "trust edge" they held over Republicans, it could jeopardize the Democratic majority in the Senate and even the hopes of Democrats like that Hillary Clinton should she run for president in 2016.

A White House link "hurts the Democratic Party and will hurt anybody who runs for president in 2016," said former Clinton White House counsel Lanny Davis, a major supporter of Hillary Clinton. Speaking on national radio's Andrea Tantaros Show, he explained that if the the White House had prior knowledge of the IRS scandal or was actively involved in the political targeting, "It will make it almost impossible to elect a [Democratic] president...I'm nervous."

Meanwhile several Democratic and GOP political advisors told Secrets that the combined scandals--IRS, Benghazi and the media source hunt--threatens the Democratic grip on the Senate. House advisors are even predicting that they will pick up nearly 10 seats if the scandals continue to eat away at the party's trust.

Davis, out with a new book on how to deal with scandals, "Crisis Tales: Five Rules for Coping with Crises in Business, Politics, and Life," slammed the Obama communications and legal offices, suggesting that the president's top lawyer is in over her head and should resign. He also criticized White House spokesman Jay Carney's jumbled handling of the IRS scandal.

Davis, who handled Clinton scandal issues, dismissed some polls showing that Obama has maintained a level approval rating. "This is going to eat away at his approval ratings," he said.

And if it turns out that the White House suggested to the IRS that they target Tea Party groups for arduous investigations into their requests for tax exempt status, "it's the end of the presidency."

This is a corrected version. The original did not accurately quote Davis' qualification that only if it's shown the White House was involved in politically targeting Tea Party groups will it make it almost impossible to elect a Democratic president.