By Ted Barrett and Ashley Killough, CNN

(CNN) - Rep. Lynn Jenkins, R-Kansas, faulted Senate Democrats on Saturday for this week's hike in student loan interest rates and urged the upper chamber to pass legislation that resolves the issue as soon as the holiday recess ends.

"For too long, politicians have been in charge of setting these rates, and we keep coming back to cliffs and deadlines like this one," Jenkins said in the GOP weekly address. "Paying for college is difficult enough without all this uncertainty. I have two kids in college, I know how hard it can be."

The interest rates on some student loans officially doubled Monday – to 6.8% from 3.4% – after the Senate failed to reach a compromise by the July 1 deadline.

The hike hits about seven million new subsidized Stafford loans this year for middle- and low-income students, but does not apply to existing loans.

Negotiators are stuck largely on the question of whether to require an overall cap above which interest rates on new loans could not rise.

Read the full post on CNN's Political Ticker blog