In a significant post-convention "bounce" the Obama re-election campaign picks up momentum with a surging 4-point gap between the President and challenger Mitt Romney.

President Barack Obama, picking up support following the Democratic National Convention, widened his narrow lead over Republican U.S. presidential challenger Mitt Romney in a new Reuters/Ipsos poll released on Saturday.

The latest daily tracking poll showed Obama, a Democrat, with a lead of 4 percentage points over Romney. Forty-seven percent of 1,457 likely voters surveyed online over the previous four days said they would vote for Obama if the November 6 elections were held today, compared with 43 percent for Romney.

Obama increased his lead over Romney in certain favorable characteristics. Asked who was more "eloquent," 50 percent of the 1,720 registered voters questioned in the poll favored Obama, compared to 25 percent for Romney. Asked about being "smart enough for the job," 46 percent sided with Obama compared to 37 percent for Romney.

Obama led Romney in a dozen such favorable characteristics, such as "represents America" or "has the right values." The only such category in which Romney had an advantage was being "a man of faith," as 44 percent picked Romney, who is Mormon, compared to 31 percent for Obama, who is Christian.