Sen. John McCain (R-Ariz.) perfectly describes Heritage: “They have clearly changed. They have clearly changed. Their reputation — you used to mention it in the same breath as A.E.I. [the American Enterprise Institute] and a couple other right-of-center [think tanks]. Now you don’t. You may disagree with A.E.I., but A.E.I. has great credibility, just like Brookings, to the left of center, has great credibility. Those two are kind of mirror opposites of each other. Brookings comes out with a study, we pay attention. A.E.I. comes out with a study, we pay attention. Now Heritage just doesn’t have the credibility.” Read the whole thing.

U.S. Capitol J. Scott Applewhite/Associated Press

An exquisitely formulated attack on the IRS. Rep. Paul Ryan (R-Wis.) to the acting IRS commissioner: “You’re here representing the president. You’re here asking us for this increase. I know you are new to the IRS. You come from the Office of Management and Budget, and you have a great reputation. So you’re a budget cruncher. How on earth do you think you have the moral authority to ask for this? Why would we — representing the taxpayers we represent — give you all this extra money you are asking for, if this is what the IRS is doing with hard-earned taxpayer dollars? Just in two months, we are seeing waste, fraud, abuse, and taxpayer targeting. And you’re saying, give us another billion dollars.

Fully vindicated. “From 2009 to 2012, a vigorous debate over Iran took place here. On one side were the optimists: President Shimon Peres, then-Mossad chief Meir Dagan, then-Shin Bet security service chief Yuval Diskin, then-Israel Defense Forces Chief of Staff Gabi Ashkenazi, the defense establishment, the media establishment and the refreshing spirit of hoping for the best. On the other side was a gloomy, besmirched pessimist: Prime Minister Benjamin Netanyahu. . . .For three and a half years, the optimists tied the pessimist’s hands on the basis of the threefold promise of America, the hidden hand and time. But suddenly, this week, along comes The Economist and says that the optimists’ absolute promise was a false promise. That it’s too late. That the enriched uranium horses have already fled the stables. The international optimists and the Israeli optimists were wrong, big time. Surprise surprise: Benjamin Netanyahu was right.”

A thoroughly devastating examination of the double standard central to the “peace process.” Elliott Abrams: “The United States has not, for example, demanded an end to Palestinian glorification of terrorism or incitement against Israel in official media as the price for starting new negotiations. Abbas continues to repeat the lie that Israel is endangering or seeking to destroy the al-Aqsa mosque; Palestinian official media continue to celebrate prisoners whose committed vicious acts of violence and terror; terrorists who prepared the bombing of civilian sites are honored by PA officials. Yet it is Israel’s commitment to peace that is doubted and from whom concessions are sought, as if the Palestinians are doing Israel and the United States a great favor by entering into negotiations that are the only route to their stated goal of an independent state.”

A totally demolished liberal talking point on the IRS scandal. “Liberal groups seeking tax-exempt status faced less IRS scrutiny than Tea Party groups, according to the Treasury Department’s inspector general. J. Russell George, Treasury’s inspector general for tax administration, told Rep. Sandy Levin (D-Mich.) in a letter dated Wednesday that the IRS did not use inappropriate criteria to scrutinize groups with ‘progressives’ in their name seeking tax-exempt status.”

Wholly amazing breakthroughs before our eyes: “We believe that in 10 years immunotherapy [which leverages the patient’s immune system to eliminate or slow the growth of cancerous cells] will likely form the backbone of 60% of all developed world cancer management regimes, driven by a paradigm shift in the overall improvement in survival rates in responsive patients.”

Entirely sound. “The Senate should not consider additional arms reductions when we have not achieved the modernization guaranteed in exchange for the last round of cuts to the arsenal. Despite the president’s pledge to pursue the “dream” of a world without nuclear weapons, the truth is that dreams don’t always match reality. The frigid reception from Kremlin officials to Obama’s call for further Russian nuclear reductions was telling. Moreover, history has proved the current Russian president isn’t exactly a good-faith negotiator.”

Jennifer Rubin writes the Right Turn blog for The Post, offering reported opinion from a conservative perspective.