Noting Hillary is a lock to be the Democratic nominee and likely the next President is the factual evidence. Anyone without any bias about this race, who opens up the polls and information about the 2016 race without prior judgement, would determine Hillary will win. Only people who have the agenda of looking for the conclusion that she will not win say otherwise.
I know you hate the Republican candidates and probably the Republican party in general, but even you have to admit that there is a SMALL chance (like 10%) that she could lose in 2016. Are you a totally deluded Hillary hack? What is this evidence you are talking about? Why do you think polls this early do mean anything? And people who say that the 2016 election will be competitive are biased and anti-Hillary hacks? Seriously?
Let's take polls out of it.
Who has the financial advantage (keep in mind all the GOP candidates will have to spend more in 2015 and the primaries)? Hillary Clinton
Who has the structural advantage (most base safe EVs to start)? Hillary Clinton, 253 EVs solid
Who has the most beloved brand name? Clinton
Who has the best surrogates (Bill Clinton, Barack Obama, Elizabeth Warren versus Mitt Romney... John McCain... George W. Bush... uh)? Hillary Clinton
Who has the more popular stance on potential major 2016 issues like minimum wage and SS/Medicare? Hillary Clinton
Does the GOP have any room to grow in white vote from 2012? No.
Does the GOP have any path to significant growth (at least a 20 point swing) in Hispanic or Black vote in 2016? No.
Can Scott Walker beat her in Florida? No. (That's 270)
Can Jeb Bush beat her in Ohio? No. (That's 270)
Can Rand Paul beat hear in Virginia? No. (That's 270)
Can Ted Cruz beat her in any swing state? No. (That's 270)
There's no path to 270 anywhere on the map for any GOP contender. Each one of them falls short in a critical swing state. The GOP is in a bad position. They have to SWEEP the swing states to win. They have less than 200 safe/solid EVs. This is impossible to win on.
In 2004, George W. Bush had Virginia, North Carolina, and Colorado locked in base. He only had to go on offense for Ohio or IA/NM/NV to win.
The resources are stretched too thin. The candidate would have to twist and pander too much.