GOP showing small shifts on taxes

The Washington Post reports:

In GOP activist circles it is known simply as “the pledge,” and over the past generation it has become the essential conservative credential for Republicans seeking elective office. Of the 242 Republicans in the House today, all but six have signed the pledge.

But now, an increasing number of GOP candidates for Congress are declining to sign the promise to oppose any tax increase, a small sign that could signal a big shift in Republican politics on taxes.