July 23 (Reuters) - Vice President Kamala Harris opened up a marginal two-percentage-point lead over Republican Donald Trump after President Joe Biden ended his re-election campaign and passed the torch to her, a Reuters/Ipsos poll found.
The poll, conducted on Monday and Tuesday, followed both the Republican National Convention where Trump on Thursday formally accepted his party's nomination and the Biden announcement on Sunday he was leaving the race and endorsing Harris.
Harris, whose campaign says she has secured the Democratic nomination, led Trump 44% to 42% in the national poll, a difference within the 3-percentage-point margin of error.
Harris and Trump were tied at 44% in a July 15-16 poll, and Trump led by one percentage point in a July 1-2 poll, both within the same margin of error.
Some 56% of registered voters agreed with a statement that Harris, 59, was "mentally sharp and able to deal with challenges," compared to 49% who said the same of Trump, 78.
