Lots of charts based on government data to click on, via the link.....but as for the question of the rich paying a greater portion of incomes taxes after the Bush cuts:

Myth #10: The Bush tax cuts were tilted toward the rich.
Fact: The rich are now shouldering even more of the income tax burden.

Popular mythology also suggests that the 2001 and 2003 tax cuts shifted more of the tax burden toward the poor. While high-income households did save more in actual dollars than low-income households, they did so because low-income house­holds pay so little in income taxes in the first place. The same 1 percent tax cut will save more dollars for a millionaire than it will for a middle-class worker simply because the millionaire paid more taxes before the tax cut.

In 2000, the top 60 percent of taxpayers paid 100 percent of all income taxes. The bottom 40 percent collectively paid no income taxes. Lawmakers writing the 2001 tax cuts faced quite a challenge in giving the bulk of the income tax savings to a population that was already paying no income taxes.

Rather than exclude these Americans, lawmak­ers used the tax code to subsidize them. (Some economists would say this made that group's col­lective tax burden negative.)First, lawmakers low­ered the initial tax brackets from 15 percent to 10 percent and then expanded the refundable child tax credit, which, along with the refundable earned income tax credit (EITC), reduced the typical low-income tax burden to well below zero. As a result, the U.S. Treasury now mails tax "refunds" to a large proportion of these Americans that exceed the amounts of tax that they actually paid. All in all, the number of tax filers with zero or negative income tax liability rose from 30 million to 40 million, or about 30 percent of all tax filers.[17] The remaining 70 percent of tax filers received lower income tax rates, lower investment taxes, and lower estate taxes from the 2001 legislation.

Consequently, from 2000 to 2004, the share of all individual income taxes paid by the bottom 40 per­cent dropped from zero percent to –4 percent, mean­ing that the average family in those quintiles received a subsidy from the IRS. (See Chart 6.) By contrast, the share paid by the top quintile of households (by income) increased from 81 percent to 85 percent.

Expanding the data to include all federal taxes, the share paid by the top quintile edged up from 66.6 percent in 2000 to 67.1 percent in 2004, while the bottom 40 percent's share dipped from 5.9 per­cent to 5.4 percent. Clearly, the tax cuts have led to the rich shouldering more of the income tax burden and the poor shouldering less.[18 ]