House Budget Chairman Paul Ryan said today that he will work off the budget Republicans passed last year when he begins writing the new budget in March.

“We’re going to be working off it,” the Wisconsin Republican said on “Fox News Sunday.” “We’re not going backwards or going forwards. We’re not backing off any of our ideas, any of our solutions.”

Democrats, who hope to win back the House in November, have been targeting Republicans who voted for that budget, which included a controversial Medicare reform plan. Ryan, who noted that means Democrats will go after “basically every Republican,” defended the Medicare reform and called out the Senate for not passing a budget in 1,005 days and counting.

“We’re going to lead, we’re going to pass a budget, and we’re going to build upon the kinds of reforms we passed last time,” said Ryan, who turned 42 today.

In the meantime, on CNN’s “State of the Union,” Senate Minority Leader Mitch McConnell said that Senate Republicans will file an amicus brief on lawsuits over President Barack Obama’s recess appointments to the National Labor Relations Board and the Consumer Financial Protection Bureau.

“Liberal presidents have always found the Congress inconvenient. … This president, even more brazenly, just ignores the Constitution altogether,” he said.

McConnell said that Congress will extend the payroll tax holiday through the end of the year by the end of February, but he declined to give specifics.

Pressed by host Candy Crowley on whether the deal will include raising other taxes, McConnell refused to rule it out.

“I’m not going to negotiate this agreement with you this morning,” he said.

Ryan Teague Beckwith contributed to this report.