POLL-Obama extends slim lead over Romney in White House race

WASHINGTON, Oct 16 (Reuters) - U.S. President Barack Obama

gained ground on Republican rival Mitt Romney in the

Reuters/Ipsos daily tracking poll on Tuesday for the third

straight day, leading 46 percent to 43 percent.

Released hours before the presidential contenders face off

for their second debate, the poll showed the number of undecided

voters had increased, indicating a drop of support for Romney

among the coveted voting bloc.

The poll showed that Obama has recovered some ground from

his slide after a poor showing in his first presidential debate.

After dropping below Romney in the wake of the Oct. 3 debate,

Obama regained the lead on Sunday and has increased that by one

percentage point each day this week.

The online survey of 1,846 likely voters was conducted

between Oct. 12 and Oct. 16. The precision of the poll is

measured using a credibility interval, which is plus or minus

2.6 percentage points for likely voters.

(Reporting by Deborah Charles; Editing by Sandra Maler)