Dems and GOP stick to guns as fiscal cliff talks resume at Capitol WASHINGTON, Dec. 30 (UPI) -- Members of Congress expressed hope Sunday a deal on the so-called fiscal cliff could be hammered out, but said the devil was still firmly in the details. Appearing on ABC's "This Week," senior senators and House members agreed a fair amount of political posturing was taking place, but that didn't discount the fact there remained significant differences between Democrats and Republicans. "Until we know exactly what the Senate's proposing, the senators couldn't tell us the details, it's impossible to know," said Rep. Chris Van Hollen, D-Md. It depends on the deal. The standoff publicly continued to revolve around President Obama and Democrats' stance that upper-income taxpayers should see their annual tab increase in order to help close the budget deficit. The Republicans' insist tax hikes on anyone would derail economic growth and the books should be balanced through cuts and other reforms to entitlement programs. "The president and a lot of folks in his party have shied away from those discussions, and I think ... it is accurate that's not going to happen in this conversation, but it should," said Sen. Jon Kyl, R-Ariz. Meanwhile, Obama said finalizing a deal on the so-called fiscal cliff had boiled down to the question of tax increases for wealthy Americans. The president said on NBC's "Meet the Press" it was the Republicans who were holding up an agreement by digging in on the tax-hike question. "They say that their biggest priority is making sure that we deal with the deficit in a serious way, but the way they're behaving is that their only priority is making sure that tax breaks for the wealthiest Americans are protected," Obama said in the interview that was taped Saturday.