Senate Majority Leader Mitch McConnell. (AP photo)

(CNSNews.com) – Republicans are not keeping the campaign promise they made to voters in 2014 to halt President Obama’s “fundamental transformation of America,” conservative and Tea Party leaders charged in an open letter to Congress on Monday.

On April 28, Senate Majority Leader Mitch McConnell (R-KY) cited fast-track trade legislation and a bill requiring congressional review of the administration’s nuclear deal with Iran as the major accomplishments of the GOP-led 114th Congress so far.

Earlier that month, Obama praised what he called “some outbreaks of bipartisanship and common sense in Congress” over Iran and trade. The president also said he was holding bipartisan talks with the Republican leadership on transportation infrastructure issues as well.

“To the extent the majority leader and the president are making nice, I’m happy. We need a lot more consensus in the federal government. There’s partisanship at every turn,” Sen. Roger Wicker (R-MS) said Monday.

But the 50 conservative leaders who signed the Citizens’ Mandate in January reminded McConnell and the rest of the Republican leadership that voters who gave them a landslide victory last November have much higher expectations for them, such as ending executive branch overreach and restoring the constitutional balance of power.

“The November election was a repudiation of President Obama’s dramatic expansion of government power both through legislative and executive actions,” stated the Citizens’ Mandate, which also has a Facebook page.

The GOP’s clear mandate is to “end Obamacare; stop executive amnesty; hold the executive branch accountable for its abuses of power and its national security failures both foreign and domestic; and put the interests of the United States of America and Americans first.”

However, instead of wielding its power as a co-equal branch of government to stop illegal immigration during the first 132 days they controlled both houses of Congress, Republicans wound up funding Obama’s executive amnesty and jeopardizing national security by failing to address the security risks posed by illegal immigration, the letter pointed out.

It was signed by former Attorney General Edwin Meese, Eagle Forum president Phyllis Schlafly, ConservativeHQ president Richard Viguerie, Lt. Gen. William Boykin (U.S. Army-Ret.), executive director of the Family Research Council, and Star Parker, a syndicated columnist and founder of the Center for Urban Renewal & Education among others.

The signatories also called out the Republican leadership for failing to repeal Obamacare, passing a budget that will increase the federal deficit by $500 billion over the next two decades, and undermining their own “faith-based agenda” by not nullifying two District of Columbia laws that violate D.C. residents’ religious liberties.

Nor has the new Republican majority stepped up to provide needed congressional oversight into a number of Obama administration scandals, including Benghazi, the Internal Revenue Service’s targeting of conservative groups and its highly controversial refugee resettlement program, the letter noted.

“Best oversight efforts to date have, surprisingly, been done by an effective outside group, Judicial Watch, who has no subpoena or constitutional power!” the letter pointed out.

Congress’ near-historic low approval ratings indicate that Republican voters are also not happy with their party’s leadership in Congress either.

A new Gallup poll found that Americans’ approval of the Republican-controlled Congress after five months is just 19 percent. According to Gallup, 73 percent of Republicans disapprove of the way Congress is doing its job.

“Several months into this new Congress, the accomplishments that have been realized could give one the impression that the gridlock is softening, particularly over the past month. But these achievements have had virtually no impact on Congress’s job approval compared with early April (15%),” Gallup reported.

“The expected ‘Republican rally’ for Congress has yet to materialize – 21% of Republicans and Republican leaners approve of Congress, not much different from the 18% of independents and of Democrats who approve.”

(Read the full Citizens' Mandate letter here: keep_promises_congress_1.docx)