Not really. The LA Times poll, instead of simply asking "if the election were held today, who would you vote for," asks voters what the chance is that they will vote for Trump, Clinton or someone else, using a 0-100 scale. The overall level of support for each candidate reflects the weighted average of those responses. 

Then they ask respondents whether they voted for President Obama or Mitt Romney. They then weight the sample so that Obama voters represent 27 percent of the panel and Romney voters represent 25 percent, reflecting the split of 51 percent to 47 percent between the two among actual voters in 2012.  Garbage in, garbage out.

 The UPI/Cvoter Poll is a tracking poll conducted online and individuals self-select to participate. In other words, a joke.

If you really want to know the state of the race, then Nate Silver's fivethirtyeight.com is the best source. He accurately called 49 of 50 states in the last two elections.  He gives Clinton an 85% chance of winning. : o