Hitler did not seize power in Germany. The German people willing and gladly turned over the reins of power to him. Then he consolidated that power. Kinda like it is happening with Obama today. Congress abdicates its responsibilities, obama fills in the vacuums
Hitler could have never won a national election to the presidency. All he had to do was win a seat with enough leverage to wheel and deal himself into a dictatorship.
He came in second to von Hindenburg in two rounds of presidential elections. von Hindenburg eventually appointed Hitler to Chancellor due to a crisis of an ineffective government.
From Wiki
The absence of an effective government prompted two influential politicians, Franz von Papen and Alfred Hugenberg, along with several other industrialists and businessmen, to write a letter to von Hindenburg. The signers urged Hindenburg to appoint Hitler as leader of a government "independent from parliamentary parties", which could turn into a movement that would "enrapture millions of people".
Rise to power
Hitler was all about governance through crisis and a perfect example of why making things worse is not likely to force people to do the right thing.