You asked, so here is a prime example of your lies and attempts to polarize things to state where nothing gets done. The most famous example of straw purchases is Operation Fast and Furious, in which federal law enforcement agents instructed licensed firearms dealers to allow the sale of some 2000 guns to suspected straw purchasers to supposedly track them into Mexico and dismantle the gun running rings. This was done under the Obama administration. Only they didn't really do any tracking, and previous experiences with similar programs under the Bush administration showed its ineffectiveness. But they pushed through all the while decreasing controls to make it even more ineffective. History pretty clearly shows that the Democrats have had a big hand in allowing straw sales of guns to Mexico.
I'll give you credit for editing your claim that Republicans repealed the assault weapons ban, but that even then you are still going about your game of stoking division so that nothing gets done.
You also talked a lot about Reagan's support for gun control, but never mentioned that he is famous for supporting it because he was scared of armed black people. This is significant because many of the proposals being pushed now would still have the effect of making it much more difficult for minorities to exercise their second amendment rights. Mandatory licensing and safety classes, mandatory laws regarding gun safes, and anything that requires potential gun owners having to jump through hoops to exercise their rights adversely affects minorities much more than it does the middle to upper class white folks who make up the majority of posters here. And most of the regulations that have those effects are not particularly needed, as we can establish plenty of reforms that don't have those effects. Magazine size restrictions are fairly color blind, for example. Red flag laws could be if they are written properly. Even age limits for semiautomatic firearm purchases are fairly colorblind, although I think many of the age limits being thrown out here are a bit extreme.