WASHINGTON (AP) — The White House is dispatching top aides and other administration officials to Capitol Hill to mollify Democratic lawmakers anxious about deep problems with the rollout of President Barack Obama's health care law.

White House spokesman Jay Carney says top Obama aide David Simas and Health and Human Services official Mike Hash met with House Democrats on Wednesday. He says Democrats want the law to succeed and have the same concerns as Obama.

And Senate Majority Leader Harry Reid, D-Nev., says Senate Democrats will discuss the law's implementation problems with White House officials on Thursday.

A growing number of Democrats are expressing concern about how the law could affect Democrats' prospects in the 2014 midterm elections. Some are backing legislation to make major changes to the law.